Welf IV Duke of Bavaria

✓ Welf IV, Duke of Bavaria ([1035/40]-Paphos 9 Nov 1101), son of Alberto Azzo II, Marquess (of Este), by Kunigunde von Altdorf (Annalista Saxo: 'Welfum seniorum' son of 'Azoni marchioni ... de castris Calun et Estin' and 'Cunizam'); heir of his maternal uncle Welf III; m. [1071] Judith of Flanders, widow of Tostig Godwinson, mother of Welf V and Heinrich IX. Source: Medieval Lands (fmg.ac, Cawley), read 2 Nov 2026: 'Bavaria, Dukes' (Welf). [DIRECT ANCESTOR OF THE COMPILER: flag added 2 Nov 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]