Gourcuff

Gourcuff or Gourkuñv also associated to Corcuff is a surname, and may refer to;
"Gourkuñv" derives from "gour" and "kuñv" which means a charming, affable, gentle or conciliatory man in Breton. Like for the surname "Henaff", the digraph "-ff" was introduced by Middle Ages' authors to indicate a nasalized vowel.