Family name Gwenegan (Gwenegan 
) , worldwide, is an extremely rare surname. The cognomen Gwenegan is characteristic of Western Europe, particularly France, where it is an extremely rare surname. Much more frequently, Gwenegan is the forename as well as the last name.
Bui, Grevin, Lebouc, Le Hen, Jaouen, Halper, Marolle, Sourget, Chabane, Cosnard, Bescond, Bourhis, Riguidel, Laurent, Auberval, Corbasson, Bouttefort, Regnauld, Delassus, Guirriec, Gerardin, Kernivinen, Gerard, Guiheu, Daumer, Derain, Rio, Mury, Prot, Dehe, Savin, Andro, Cueff, Perez, Roger, Goron, Trouillaud, Gouil, Jamet, Evain, Vinet, Mathou, Morvan, Saupin, Carrel, Cossec, Bertho, Benoit, Louis, and Guillemard