Goff is a surname of Celtic origin. It is the 946th most common family name in the United States. When the surname originates from England it is derived from an occupational name from Welsh, Cornish or Breton. The Welsh ''gof'' and the Breton ''goff'' means "smith" (cognate with Irish ''gobha''). The English-originating surname is common in East Anglia, where it is of Breton origin. The Welsh name is a variant of the surname Gough, and is derived from a nickname for someone with red hair. The native Irish name is derived from a patronymic form of the Gaelic personal name Eochaidh/Eachaidh, which means "horseman".
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