In Irish mythology Foidbgen (Fodbgen, Odbgen, Foidhbhgen, "the despoiler") son of Sengann (2) of the Fir Bolg became High King of Ireland when he overthrew his cousin Rinnal son of Genann. It is said that before his time there were no knots (Old Irish odb) in trees.
He ruled for four years until he was overthrown by Eochaid mac Eirc, Rinnal's grandson.
See also
Lebor Gabála Érenn