Guillaume I de Nevers Count of Nevers

✓ Guillaume [I], Comte de Nevers and d'Auxerre (1040), Comte de Tonnerre in right of his wife (d. 20 Jun 1098, bur. Nevers, Saint-Etienne), son of Renaud [I], Comte de Nevers, and Hedwige (Advisa) of France (I100773 x I100774): his father's Cluny charter [1028/40] for 'uxoris mee Advise et filiorum meorum' subscribed by 'filii eorum Willelmi'. m. (1) c.1039 Ermengarde, Comtesse de Tonnerre. RING 19 Oct 2026 into Nevers / Robert the Pious. Source: Medieval Lands (fmg.ac, Cawley), 'Burgundy Duchy - Nevers'. [DIRECT ANCESTOR OF THE COMPILER: flag added 19 Oct 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]