Son of godfrey,' a teutonic personal name, variously written as gothfrith, guthfrith, etc.; very common among the normans, by whom it may be said to have been introduced into england, though as gothfrith it was sometimes found among the anglo-saxons, (Sloinnte Gaedheal is Gall )
Son of godfrey'; older mac gothfhradha, mac gothfhraidh; a variant of mac gofradha, mac gofraidh and mac gafraidh, which see, (Sloinnte Gaedheal is Gall )
Descendant of gothfraith' (god-peace, anglicised godfrey, a name introduced by the danes and early adopted by the irish); a not uncommon surname in east limerick and tipperary. the family, which is old in that district, is probably of danish descent, (Sloinnte Gaedheal is Gall )
Sources:
Sloinnte Gaedheal is Gall An Sloinnteoir Gaeilge agus an tAinmneoir