The origin of this name is still today quite uncertain. The theories include: 1) From the Indo-Germanic “*ghosti-s” (stranger), Old High German “gast” (guest). 2) Originally an ethnic name for a “Gascon” (inhabitant of Gascony) an ancient region of southwestern France. The first appearance of the name could be dated during the Middle Ages or earlier. 3) The name seems related to the Basque root “eusk-“ meaning “Basque”, in reference to the Aquitanians, a people who spoke a Basque-related language and inhabited an area limited to the north and east of the Garonne River. Saint Gaston in French, († ~540) was an early bishop in the Frankish realm.