A Frisian Warlord Who Ruled in Brittany, Until His Wife Cheated on Him

Where the English Channel meets the Celtic Sea, the ships of the Frisian brothers Corsold and Coarchion are said to have sailed, raided, and held sway in the early sixth century. For a time, they may even have established a short-lived kingdom in Brittany. Breton legend holds that the village of Kersaout — modern-day Corseul — was once the residence of dux Corsold. The place name (Haut)-Bécherel, known for its Roman ruins, might derive from the Old Frisian word beki, meaning ‘stream’ (Bourgès 2010). Breton tradition also attributes the construction of Camp des Rouëts, the ancient fortress near the village of Bodieu, to Corsold (Vincent 2020). Lastly, the Breton motto, Kentoc’h mervel eget bezañ saotret — ‘rather dead than dishonoured’ — resonates with a familiar Frisian sentiment. So how is it that echoes of Frisians survive in the folklore of Brittany?

An old text refers to a certain dux — a leader — named Corsold. This reference appears in the Vita inedita S. Melori martyris in Britannia Minori, or The Unpublished Life of Saint Melor the Martyr in Lesser Britain [i.e., Brittany], written by an anonymous author. The exact date of the Vita S. Melori remains a matter of scholarly debate. Some place its origin at the end of the eighth century, others at the beginning of the ninth, still others between 1060 and 1080, or even as late as the twelfth century (Lebecq 1983, Chédeville 1985, Brett 2020). In plain terms: no one really knows how old it is. Let’s just say — it’s hella old.

Saint Melor was decapitated at the age of fifteen in the early eighth century. His head, which he held in his hands, spoke posthumously. Indeed, a talking head. Melor was a young prince of Cornouaille ‘Cornwall’ in Brittany. A descendent of the two Brittonic nobles named Lex and Regula which translates as ‘law’ and ‘rule’. Both, Lex and Regula, left Britannia during a time when Frixones ‘Frisians’ under the command of Corsold thoroughly devastated the lands. King Lex, also named John or Jean, sailed across the sea to Cornwall armoricaine, what is now known as Brittany, to found a kingdom (Lebecq 1983).

It might also be that Frisians devastated parts of Brittany, instead of ransacking insular Britain. The text of the Vita S. Melori is namely ambiguous on this point (Chédeville 1985).

Is post desolationem Frixonum et Corsolid ducis nostram audiens desertam Cornugalliam. Classe mare cum maximo Comitatu transmeavit, Regnum accepit, habitavit, excoluit.
Vita S. Melori

After the desolation by the Frisians and Corsold, our leader [King John] heard of the deserted [Armorican] Cornwall. He crossed the sea [the English Channel] with a great fleet, took the kingdom, inhabited it, and cultivated it (Bourgès 1997).

In addition to the Vita S. Melori, another rather old source recounts the exploits of Corsold: the Chronicon Briocense, or Chronicle of Saint Brieuc, written in the late fourteenth century. The sources used by the anonymous author are unknown and have since been lost.

In this account, Corsold appears alongside his brother Coarchion. The story is set around the year 560, following the death of King Conober of Brittany, a moment when the kingdom was left vulnerable to external threats. The Frisians — this time in the company of Goths, Alans, and other tribes — are said to have invaded and conquered parts of Brittany. According to the chronicle, they were all described as cruel and devilish peoples.

The Frisians, who had come from overseas, were not only skilled navigators but also excellent traders. They engaged in buying and selling goods in the wider region (Codecasa 2017). However, raiding remained part of their income-generating activities as well. They attacked the ships of the princes of Dononée, the former kingdom, which comprised more or less present-day Cornwall in the southwest of England. When the Frisians conquered Brittany, many Bretons diverted to Cornwall across la Manche, the English Channel. Bretons who stayed behind lived a miserable life as slaves under harsh Frisian rule.

In addition, the same Chronicon Briocense recounts an interesting plot:

Warlord Corsold had a very beautiful wife named Aleth, also spelled Alétha. Her beauty apparently could not be resisted by his brother and greatest warrior Coarchion. One day, when Corsold returned from one of his raiding expeditions, he learned of the affair between his brother and his wife and that his brother had carried his wife away. Heartbroken Corsold, taking every noble and brave warrior with him, sailed with his ships after the two renegades, as fast as the wind would take him and his oarsmen could row. Corsold and his army never returned. Only a few men did. To quote the chronicle: ‘nec unquam cum am(ica) reversus est’ which basically means that no one ever heard or saw anything from them again — leaving his successful kingdom weakened behind and to be reconquered by the Bretons soon (Morice 1742, Roujoux 1839, Chédeville 1985, Vincent 2021). For all we know, Corsold and his men still chase the seven seas.

Note that Alethum is the ancient name of the modern town of Saint-Malo in Brittany (Codecasa 2017), explaining the name of Corsold’s gorgeous Aleth or Alétha (Brett 2022).

salt marsh near mouth of the River Couesnon, 11th-century chapel Sainte-Anne-de-la-Grève, and in the background Mont-Saint-Michel

Possibly building upon the old medieval texts mentioned above, the Vita S. Melori and Chronicon Briocense, in the nineteenth more ‘history’ is documented in the French archives.

According to French historians of the Romantic era, Frisians hung out around the Celtic Sea and the English Channel, where they are said to have clashed with King Hoel the Great, a relative of the legendary dux bellorum (warlord) King Arthur. Hoel is described as king of Brittany, and his victories over the Frisians in the first half of the sixth century reportedly earned him a solid reputation. He is also known in some traditions as Hywel or Sir Howell, and is later associated with the mythical Knights of the Round Table.

Kings Hoel II and Budic of Brittany likewise had to contend with Frisian incursions into Breton territory. In these accounts, the Frisians are portrayed as allies of the Franks. It is even alleged that they poisoned King Budic in 509, after which they expanded into parts of Brittany. This period is said to have contributed to a wave of Breton migration to Britain (Guépin 1839).

In these Romantic-era narratives, the Frisians are increasingly depicted as becoming more aggressive and crueller over time.

Another account of the period recounts that Riwallo Murmaczon, a prince from Cornwall, also engaged the Frisians in Brittany and succeeded in defeating the remnants of Corsold’s army. By this time, the Frisians are said to have been weakened by internal divisions between the brothers Corsold and Coarchion. In addition to the Frisians, the Bretons were also required to confront the Goths. Some sources suggest that these clashes with the Frisians may have taken place in the region around Tréguier, as it is reported that the Bretons of this area, together with those of Letanie (modern-day Léon in northwestern Brittany), suffered heavily under Frisian domination (Roujoux 1839).

It is noted that in the province of León in Spain, a village still recalls the presence of ‘northerners,’ namely the village of Lordemanos, possibly indicating a tenth-century Scandinavian settlement. Another related toponym, Lordemão, appears as the name of a neighbourhood in the city of Coimbra in Portugal. Finally, on the coast of Galicia, at the mouth of the River Ulla, a settlement known as Lodimanos is also attested (García Losquiño 2018). The terms Lordomanni or Nordomanni were medieval exonyms used in the Iberian Peninsula to refer to ‘men of the north.’

Somehow the events of Corsold, Coarchion, and beautiful Aleth remind us of the Hollywood movie The War Lord of 1963. The setting of this classic movie is Normandy in the High Middle Ages. It is a story in which two brothers battle against each other, and the warlord wants to take his mistress to his water castle in the Frisian lands. For more, see our blog post Filmstar Ben-Hur Made Peace With Frisian Raiders.

The story of Corsold also has parallels with two other famous Frisian brothers who lived in the fifth century, namely the warriors Hengist and Horsa, and the beautiful Rowena, the sister of Hengist. These brothers came from overseas as well.

How to make head or tail from all this?

In Cornish and Breton early history, raids by many tribes play an important role as soon as the Western Roman Empire started to lose its grip on its territory and external borders, especially from the fifth century onward. It is a period when the Atlantic coasts of Gaul are also being raided by different Germanic tribes, and these even settled there, including Saxons (Van der Tuuk 2024). Saxons originating from more or less the same southern North Sea coast where the Frisians lived, too. Frisians and Saxons, if you can put a label on these people anyway in that restless era, were difficult to distinguish from each other until around the end of the sixth and the beginning of the seventh centuries.

The Breton sagas describing raids by Frisians suggest that the Frisians were regarded as one of several barbarian Germanic groups, and in some accounts as a somewhat distinctive presence among them. In Britannia (Britain), the Britons were said to have come under pressure from Picts, Jutes, Frisians, and especially the Angles and Saxons. Following the withdrawal of Roman authority from Britannia in the early fifth century AD, many Britons are also said to have migrated from the Isles to the south, settling in Armorica — later known as Brittany, or Britannia Minor (‘Lesser Britain’). This movement is often interpreted as part of a wider period of displacement, in which local rulers sought new territories as Germanic groups assumed dominance after the Roman withdrawal. In this perspective, both sides of the English Channel were once part of a more continuous Celtic cultural sphere, though this unity was increasingly disrupted by migration and conflict.

Brittany itself is likewise portrayed as a region in flux, marked by instability and upheaval. For example, in the late 460s AD, the Briton/Breton ruler Rhiothamus, reportedly in alliance with Rome, is said to have landed with an army of around 12,000 men on the coast of northern Gaul to confront the Visigoths (Wijnendaele 2024). Such figures should be treated with caution, as medieval and early historical sources often exaggerate troop numbers, but nonetheless.

Raiding groups and mobile tribal factions also included Frisian warbands, which are said to have taken control of parts of the northern coast of Brittany in the sixth century AD.

An alternative possibility is that they were permitted to settle there, following a strategy more commonly associated with Roman frontier policy: forming alliances with Germanic groups by granting land in exchange for military service and the defence of imperial borders against other raiding peoples. Comparable arrangements are often cited in relation to the Saxons in south-eastern Britain and the Franks along the Lower Rhine in what is now the Netherlands and Germany. The Burgundians, too, were at times incorporated into the Roman system as foederati or auxiliary forces. Within this interpretative framework, the Frisians may have established a more or less permanent presence in Brittany, later remembered variously as merchants and sailors, but also as cruel and predatory raiders.

Warlord Corsold, awarded the title of dux ‘leader’ in the oldest texts, but in some, more recent, books also named king, was one of the Frisian big men. He is also known as compté de Léon ‘count of Léon’ (Abelard 2017), since the Frisians allegedly settled in this north-western corner of the peninsula of Brittany.

Besides being mentioned in old texts, the memory of Corsold’s name survives in a few local traditions in the village of Bodieu in Brittany as well (Vincent 2021). Some even argue that the placename Corseul in Brittany derives from Corsold (Bizeul 1857; see note further below). Eventually, Britons from Greater Britannia, i.e., insular Britain, crossed the English Channel and drove out the Frisians once and for all. Bretons who had been enslaved by the Frisians were finally freed: the so-called liberation of Brittany: Kentoc’h mervel eget bezañ saotret ‘rather dead than dishonored’ as mentioned at the start of this blog post. This victory was facilitated because discord had arisen among the ranks of the Frisians. The reader surely will understand; otherwise, it would not have been possible for the Britons to defeat them anyhow!

The events ought to have taken place at the end of the Migration Age and the beginning of the Early Middle Ages. It takes place in a time when the Western Roman Empire was slowly losing its grip and had to deal with all the different barbaric coalitions and tribes, but still, it was the legitimate and strongest power on the Continent (Wijnendaele 2024). A period when the tribes and peoples of the wider North Sea region were on the move. A time when Angles, Saxons, Jutes, and, perhaps to a lesser extent, Frisians settled in Britain. On top of this, the mighty federation of Germanic tribes under the name Franks became increasingly powerful in the north-western part of the Continent, eventually establishing Francia as the successor of the Western Roman Empire.

Centuries later, when Bretons migrated from Britain to Armorica, i.e., Brittany, their arrival was described by poet Ermoldus Nigellus, also known as Ermold le Noir. Ermoldus, attached to the Frankish royal court, lived at the beginning of the ninth century. He gives a less heroic description of the arrival of the Bretons. Ermoldus described these Celtic immigrants from the sea as poor people seeking protection from the wind and rain, and something to live off. They were a brutal, rude, and unmannered people, living incestuous lives with brothers and sisters sharing the same bed, and only in name Christian, all according to Ermoldus. Maybe, we add, the past centuries living on the Isles under the new Anglo-Saxon rule had not done much good for the Celts.

Or is it the negative framing of immigrants that is of all times? Like Mexican immigrants in the US eating cats and dogs, for example, or the gelukszoekers ‘fortune seekers’ in the Netherlands.

Another lesson of this story, apparently, is that successful warlords can get into trouble when beautiful women come into play. King Arthur, too, had his share when he was seduced by his own (half-)sister Morgane, who bore him a son. In a final battle between Arthur and his son, both were slain. But see also our blog post Don’t Believe Everything They Say About Sweet Cunera about what happened with princess Cunera, King Radbod, and his wife.

What is next?

Exploring the scattered traces of the warlord Corsold and the possible presence of Frisians in early medieval Brittany feels a bit like venturing into the deep web — never quite sure whether you have accidentally crossed into the forbidden dark web. Grappling with obscure 150-year-old French texts only added to that sensation.

What is particularly striking is that no historian or scholar outside of France appears to have given dux Corsoldus any serious attention. At least, we are unaware of any other-language histories of early-medieval Frisia that even mention him — except for one: the father of early Frisian history himself, the Frenchman (!) Stéphane Lebecq (1983).

As humble hikers through the mists of early medieval history, we have attempted to sketch a very rough picture of Corsold in the English language, and now we wait — hopefully — for future historians or any other clever fellow to pick up the thread. If not, we may have to rely on artificial intelligence and quantum computing to finally untangle this obscure corner of the past.

Note 1 — A word on archaeological site Camp des Rouëts. Local tradition tells this earthen fortress at the village of Bodieu in the municipality of Mohon, was the residence of Breton kings, and originally erected by the Frisian warlord Corsold. Not only it functioned as a fortress but, according to tradition, also as love nest of Coarchion and Aleth (Vincent 2021). The structure is a so-called motte castle and dated tenth century (Boule 2021). Motte castles were a widespread defensive structure in Europe consisting of a handmade mound with a single lone-standing tower, surrounded by a moat and a palisade. In other words, Viking Age material and therefore much too young to be erected by Corsold. The castle hill of Rouëts is about eight metres high and its moat about ten metres deep.

That Corseul is associated with Corsold, is not historic (Brett 2022). The old name of Corseul is civitas Coriosolitum and documented around AD 400, after a Gallic people named the Curiosolites mentioned by the Romans first century BC. Other spellings of the name Corsold besides Corseul and Corsoldus, are: Corseult, Corsult, Corsolt, Corsoult, Cursoul, Corseu, Courseu, and Corseulle (Haize 1900).

Concerning the toponym (Haut)-Bécherel stemming from the Old Frisian word beki (Bourgès 2010), it must be noted that the Old Norwegian word bec for ‘small river or rivulet’ might also be its origin (García Losquiño 2018).

Note 2 — We noticed, the history of Brittany is marbled with kings and overlords, like King John and lord Corsold, coming from oversees and establishing new kingdoms and new laws. This is very comparable with the social memories existing in medieval Frisia and in Anglo-Saxon England. See our blog post We’ll Drive Our Ships to New Land.

Another similarity in the former oral tradition between Frisia and Brittany is towns being drowned in the sea as punishment for mocking God and the Gospel. Most notably the town of Rungholt in the region of Nordfriesland. Brittany, has the exact same stories to tell. About splendid cities that disappeared into the waves. Like the town of Rungholt, the Breton city of Ker-Is was left intact and merely covered by the sea. Other drowned, rich Breton cities are Tolente, Nasado, Herbauges, and the city at the dunes of Saint Efflam. Sagas concerning the latter speak of a preserved city under water, including church tower bells. Sounds familiar from the Frisian sagas? See, for example, our blog post How a Town Drowned Overnight. The Case of Rungholt.

Finally, the theme of living as slave under the yoke of an invading tribe, is recognizable in both the Breton as the Frisian sagas. Whereas the Bretons lived as slave under the rule of cruel Frisian raiders from the north, the Frisians lived as slave under the rule of the Danish raiders from — also — the north. See our blog post With a Noose Through the Norsemen’s Door.

Frisians, in their different speeches along the Wadden Sea coast, use for centuries the phrase leaver dea as slaef, liewer düd aß Slaawe, lever dood as Slav, lewer duad üs Slav, etc., meaning ‘better dead than slave’. Bit like the copycat yell of William Wallace in the movie Braveheart: “They may take our lives but they will never take our freedom!”

Note 3 — It goes without saying that Corsold had been indicted before the International Criminal Tribunal for Frisia (ICTF) to be tried for the harm he has done to the Breton people. See also our press release Consensus Frisia Tribunal.

Note 4 — About the same time, two other Frisian war-leaders caused turmoil in the region. They were Hengist and Horsa who, after having fought alongside King Vortigern of the Britons first, caused terror among the Britons and founded the first Anglo-Saxon kingdom: the Kingdom of Kent. See our blog post Hengist and Horsa — Frisian Horses From Overseas That Founded the Kentish Kingdom.

Suggested hiking

You can do some great hiking in Brittany. First of all, there’s the GR34 and nicknamed the Sentier des Douaniers ‘path of the custom officers’. A coastal path of 2,000 kilometres.
Then there is Tro Breizh which is an ancient pilgrimage passing the graves of the Seven Founder Saints of Brittany. It is always seven, like the Seven Sealands of medieval Frisia, or the Republic of the Seven United Netherlands, that is, the Dutch Republic. But this aside.
When visiting Camp des Rouëts near the village of Bodieu, you can also make a circular walk of fourteen kilometres: Circuit des Rouëts. Find more information on the site of MonGR.fr.

Suggested music

Donna Summer, I Feel Love (1977)
Talking Heads, Life During Wartime (1983)
Bon Jovi, You Give Love A Bad Name (1986)

2 thoughts on “A Frisian Warlord Who Ruled in Brittany, Until His Wife Cheated on Him ”

Bon Repos Gites says:

November 13, 2022 at 5:21 pm

A very interesting read! It is a fascinating time in history and so frustrating that so much of the early written histories have been lost to us. Encouragingly, early documents written in Latin or Old Breton are still being re-discovered today; lost for centuries in the archives of some other part of France. Perhaps we will learn more, one day.

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