Fergus mac Róich
Another legendary Ulster king, Fergus mac Léti, is regarded as a double of Fergus mac Róich: both die in water, and are associated with the sword Caladbolg. Another legendary Fergus, Fergus Foga of the Corcu Óchae of Munster, is identified with Fergus mac Róich by T. F. O'Rahilly.