In about 660, the Duchy of Vasconia united with the Duchy of Aquitaine to form a single realm under Felix of Aquitaine, ruling from Toulouse. This was a joint kingship with a Basque Duke, Lupus I. "Lupus" is the Latin translation of Basque Otsoa, "wolf". At Felix's death in 670 the joint property of the kingship reverted entirely to Lupus. As the Basques had no law of joint inheritance but relied on primogeniture, Lupus in effect founded a hereditary dynasty of Basque rulers of an expanded Aquitaine.