Cadwallon is a

Welsh Welsh may refer to: Related to Wales * Welsh, referring or related to Wales * Welsh language, a Brittonic Celtic language spoken in Wales * Welsh people People * Welsh (surname) * Sometimes used as a synonym for the ancient Britons (Celtic peopl ...

name derived from the

Common Brittonic Common Brittonic ( cy, Brythoneg; kw, Brythonek; br, Predeneg), also known as British, Common Brythonic, or Proto-Brittonic, was a Celtic language spoken in Britain and Brittany. It is a form of Insular Celtic, descended from Proto-Celtic, ...

''*Katuwellaunos'' (

Proto-Celtic Proto-Celtic, or Common Celtic, is the ancestral proto-language of all known Celtic languages, and a descendant of Proto-Indo-European. It is not attested in writing but has been partly reconstructed through the comparative method. Proto-Celt ...

*''Katu-welnā-mnos'') "The One Who (-mnos) Leads (welnā-) in Battle (katu-)". The same name belonged to the

Catuvellauni The Catuvellauni (Common Brittonic: *''Catu-wellaunī'', "war-chiefs") were a Celtic tribe or state of southeastern Britain before the Roman conquest, attested by inscriptions into the 4th century. The fortunes of the Catuvellauni and their ...

who lived in what is now Hertfordshire, one of the most powerful British polities in the

Late Iron Age The Iron Age is the final epoch of the three-age division of the prehistory and protohistory of humanity. It was preceded by the Stone Age (Paleolithic, Mesolithic, Neolithic) and the Bronze Age (Chalcolithic). The concept has been mostly ap ...

who led the resistance against the Romans in 43 CE and possibly against Caesar in 55 and 54 BCE as well. ''Cadwallon'' is not to be confused with ''Caswallon'', which derives from ''*Kađđi-welnā-mnos'' (the same name as

Cassivellaunus Cassivellaunus was a historical British military leader who led the defence against Julius Caesar's second expedition to Britain in 54 BC. He led an alliance of tribes against Roman forces, but eventually surrendered after his location was rev ...

), meaning "The Passionate Leader". Note that in Cornish, both ''Katuwellaunos''(/Catuvellaunus) and ''Kađđiwellaunos''(/Cassivellaunus) give the form Kaswallon, which adds to the confusion. Cadwallon may refer to: *

Cadwallon Lawhir ap Einion Cadwallon ap Einion (c. 460-517 or 534), usually known as Cadwallon Lawhir ('Long Hand') and also called Cadwallon I by some historians, was a Wales, Welsh ruler around 500. Cadwallon was the son of Einion Yrth and Prawst ferch Deithlyn. He is oft ...

(reigned early 6th century), King of Gwynedd *

Cadwallon ap Cadfan Cadwallon ap Cadfan (died 634A difference in the interpretation of Bede's dates has led to the question of whether Cadwallon was killed in 634 or the year earlier, 633. Cadwallon died in the year after the Battle of Hatfield Chase, which Bede rep ...

(reigned early 7th century), King of Gwynedd *

Cadwallon ab Owain __NOTOC__ Owain ap Hywel (died ) was king of Deheubarth in south Wales and probably also controlled Powys. Owain was one of the three sons of King Hywel the Good. Upon Hywel's death in 948, Owain, Rhodri, and Edwin divided his lands among ...

(died ), prince of Deheubarth * Cadwallon ab Ieuaf (died 986), King of Gwynedd * Cadwallon ap Gruffydd (12th century), son of Gruffudd ap Cynan * Cadwallon ap Madog (12th century), ruler of Maelienydd * ''Cadwallon'' (role-playing game), a 2006 game published by Rackham *

Cædwalla of Wessex Cædwalla (; 659 – 20 April 689 AD) was the King of Wessex from approximately 685 until he abdicated in 688. His name is derived from the Welsh Cadwallon. He was exiled from Wessex as a youth and during this period gathered forces an ...

(c. 659 – 689), King of Wessex (''Cædwalla'' is the Old English spelling of ''Cadwalla'' (< Brythonic ''*Katuwallios''), an alternative form of the same name.)

See also