Fitzgibbon

Fitzgibbon, FitzGibbon, Fitz-Gibbon and Fitzgibbons are Irish surnames of Hiberno-Norman origin.

The surname originates with Gilbert (Gibbon) FitzJohn, who was an illegitimate son of John FitzThomas, 1st Baron Desmond (died 1261); the line of Anglo-Norman aristocracy in Ireland descended from Gilbert became known as Fitzgibbon. Fitzgibbon means "son of Gibbon", derived from Norman French ''fiz''/''fitz'' (meaning "son") and ''Gibbon'' (a Norman French affectionate form of the name Gilbert). The Gaelicised form of Fitzgibbon is ''Mac Giobúin''. Provided by Wikipedia