Hugh the Abbot (died 12 May 886) was a member of the Welf family, a son of Conrad I of Auxerre and Adelaide.
After his father's death, his mother apparently married Robert the Strong, the margrave of Neustria.
Hugh welcomed Charles when the king had to flee during an 858 invasion of Louis the German, when his vassals refused him aid and rebelled under Robert the Strong.
He was the archchaplain of the royal court and one of the chief ministers of the joint-kings Louis III and Carloman.
He supported Charles the Fat on his succession to West Francia in 884, but he died before he could lend aid to the defence of Paris during the siege of 885–86.