 A "Seguin" was attested in Frankish chronicles when referring to the Count of Bordeaux and Duke of Vasconia (778, 814 and 816).The name is also recorded as Sihiminus, perhaps a rendering of "Ximinus".He may have been a local Basque whose family later fled south over the Pyrenees and helped Enneco Arista take over in Pamplona.