Eldol is a legendary king of Britain in Geoffrey of Monmouth's work Historia Regum Britanniae ("The History of the Kings of Britain"). He came to power in 155BC.[1] He was succeeded by Redion.[2]
A 6th century hero called Eidol is mentioned in The Gododdin but is unlikely to be the source for Geoffrey's Eldol. He should also not be confused with Eldol, Consul of Gloucester, who lives generations later in Geoffrey's work.