Brythonic Names

These names were used by the ancient Britons. See Ancient Celtic names for a broader list.
gender
usage
Arthfael m Ancient Welsh
Welsh form of Armel.
Arthmael m Ancient Welsh
Old Welsh form of Armel.
Cadeyrn m Ancient Welsh
Means "battle king" from Welsh cad "battle" and teyrn "king, monarch". Cadeyrn (also known as Catigern) was a 5th-century king of Powys in Wales, the son of Vortigern.
Caratacos m Brythonic
Derived from the Celtic element car meaning "love". This was the name of a 1st-century British chieftain who rebelled against Roman rule.
Cunobelinus m Brythonic
Possibly means "hound of Belenus" from the old Celtic element koun "hound" combined with the name of the god Belenus. This was the name of a 1st-century king of southeast Britain.
Cynbel m Ancient Welsh
Derived from Welsh cyn "chief" and bel "war".
Cynwrig m Ancient Welsh
Derived from Welsh cyn meaning "chief" and gwr meaning "hero, man", plus the suffix ig indicating "has the quality of".
Elisedd m Ancient Welsh
Derived from Welsh elus meaning "kind". This was the name of two kings of Powys in Wales.
Gwrtheyrn m Ancient Welsh
Means "supreme king" from Welsh gor meaning "over" and teyrn meaning "king, monarch". It is possible that this is not a name, but a title. According to medieval chroniclers, Gwrtheyrn (also known as Vortigern) was a 5th-century king of the Britons. It was he who invited the brothers Hengist and Horsa to Britain, which eventually led to the Anglo-Saxon conquest of England.
Morcant m Ancient Welsh
Old Welsh form of Morgan 1.
Nynniaw m Ancient Welsh
Meaning unknown, presumably of Brythonic origin. According to the 12th-century chronicler Geoffrey of Monmouth, this was the name of a British prince who fought against the invading forces of Julius Caesar. It was also borne by an 8th-century Welsh historian, usually known by the Latinized form Nennius.
Seisyll m Ancient Welsh
Old Welsh form of Sextilius.