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Post-Roman Celtic Kingdoms

Celts of Britain

 

 

 

View Map of Celtic Britain Cornubia (Corniu / Cerniw)

A sub-kingdom of the greater Dumnonian kingdom, it was the last free British territory in the south of Britain (outside Cymru) to survive, absorbing into it (or being absorbed into) the remnants of Dumnonia so that the two eventually became indivisible. It was first created a sub-kingdom by Constantine Corneu. Penwith, the upper westernmost cantref, was a principality in its own right for a time, being owned by a king of Brittany.

Known as Cornubia during Roman and immediately Post-Roman Britain, the name became corrupted by the dramatic changes in the British language in the sixth and seventh centuries, and by being passed through Welsh hands. The name means "people of the horn", ie the Land's End section of the Cornish peninsula. The Saxons called them Corn-wealas, Cornwall (wealas being the Saxon word for foreigner or stranger, which is what they applied to all Britons in their own land).

Cerniw is not to be confused with the name Cernyw used to describe the kingdom and sub-kingdoms that formed the early Glywyssing. The latter name had fallen out of use by the sixth century.

443 - al.500

Merchion ab Custennyn

Son of Constantine Corneu, King of Dumnonia.

c.500

The territory of the Isles of Scilly (the kingdom of Lyonesse) is granted to Merchion's younger son, while his elder son inherits Cerniw.

c.500

Cyn-March ap Meirchion (Mark)

Son? Prince of Poher.

c.510

St Selyf (Salom) ap Erbin

Cousin of Mark.

c.510

The line appears to die out here, so Cornubia seems to pass back to Dumnonian hands, with a Duke of Cornubia nominally governing the land.