Clean up needed The list lacks of many Dukes specially the first Frankish ones and those that were also Dukes of Aquitaine Some linked Dukes s dates and correlations are somewhat confuse and inconsistent with each other For those who can read Spanish a complementary source may be Au amendi Encyclopedia corresponding entry but it is a historical article not specifically focused in the Dukes but the Duchy and ending with the transformation of Vasconia into Gascony after Arnold s death I have just written the corresponding entry Duchy of Vasconia based on it and when checking I found some incongruencies specially with Counts of Vasconia a separate realm listed as Dukes and some dates