Wikipedia
Fitzpatrick (surname)
The surname Fitzpatrick is the known translation of at least two different surnames: Mac Giolla Phádraig and Ó Maol Phádraig from the original Irish to English. Currently, it is ranked as the 60th most common surname in Ireland with an estimated 12,700 individuals bearing the name. While both Mac Giolla Phádraig and Ó Maol Phádraig have similar meanings, they are likely unrelated; yet both have arrived in the modern era as Fitzpatrick. Despite the prefix "Fitz-", Fitzpatrick is not a name of Hiberno-Norman descent.
Fitzpatrick
The name Fitzpatrick (also spelled "Fitz-Patrick" or "FitzPatrick") is an anglicisation of the ancient Irish surname Mac Giolla Phádraig, and may refer to several different people or places or things: