Catellus () was a legendary king of the

Britons British people or Britons, also known colloquially as Brits, are the citizens of the United Kingdom, the British Overseas Territories, and the Crown dependencies.: British nationality law governs modern British citizenship and nationality, w ...

, as recounted in

Geoffrey of Monmouth Geoffrey of Monmouth (; ; ) was a Catholic cleric from Monmouth, Wales, and one of the major figures in the development of British historiography and the popularity of tales of King Arthur. He is best known for his chronicle '' The History of ...

's work ''

Historia Regum Britanniae (''The History of the Kings of Britain''), originally called (''On the Deeds of the Britons''), is a fictitious account of British history, written around 1136 by Geoffrey of Monmouth. It chronicles the lives of the List of legendary kings o ...

''. He came to power in 269BC. According to Geoffrey, he was the son of King Gerennus and was succeeded by his son, Millus. In some versions of the ''

Brut y Brenhinedd ''Brut y Brenhinedd'' ("Chronicle of the Kings") is a collection of variant Middle Welsh versions of Geoffrey of Monmouth's Latin ''Historia Regum Britanniae''. About 60 versions survive, with the earliest dating to the mid-13th century. Adapt ...

'', a series of Welsh versions of Geoffrey's ''Historia'', Catellus is succeeded by his son Coel, who is then succeeded by his own son Porrex II.National Library of Wales, Welsh Classical Dictionary, page 621
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References

{{Geoffrey of Monmouth 3rd-century BC legendary monarchs Legendary British kings