Cuilén

Cuilén mac Ildulb (Modern Gaelic: Cailean), sometimes anglicised as Culen or Colin, and nicknamed An Fionn, "the White" (died 971) was king of Scotland (Alba) from 967 to 971. He was one of the three known sons of King Indulf (Ildulb mac Causantín), the others being Amlaíb and Eochaid.

It is supposed that Cuilén was implicated in the death of his predecessor Dub (Dub mac Maíl Coluim), who had defeated Cuilén in battle in 965.

The Chronicle of the Kings of Alba reports several events in the reign of Cuilén. It says that Marcan son of Breodalach was killed in Lothian, that Cellach, Bishop of Cennrígmonaid, and Máel Brigte, also a Bishop, died. Other reported deaths include Domnall mac Cairill and Máel Brigte mac Dubacain, the identities of whom are unknown, but they must evidently have been important men. Máel Brigte might be a son of the Dubacan mac Indrechtaig, Mormaer of Angus, who was killed at the Battle of Brunanburh in 937. Finally, we are told that Leot and Sluagadach went to Rome, presumably on church business.