Digueillus (also Cligueillus or Eligueillus; Welsh: Llefelys) was a legendary king of the Brythons according to Geoffrey of Monmouth. He was the son of King Capoir and succeeded by his son Heli. He came to power in 113BC.^[1]

Geoffrey portrays him as a wise and modest ruler who cared greatly about the administration of justice among the Brythons.^[2]