William V ( French: Guillaume V) was Count of Nevers and Auxerre from 1175 through 1181. [1] His parents were Guy of Nevers and Mathilda of Grignon. [2]
Following his father's death in 1175, his mother, Mathilda, was regent during his lifetime. [1] He died as a child in 1181. [1] William's sister, Agnes would become heiress of Nevers. [1]