William V () was

Count of Nevers The counts of Nevers were the rulers of the County of Nevers, in France, The territory became a duchy in the peerage of France in 1539 under the dukes of Nevers. History The history of the County of Nevers is closely connected to the Duchy of Bu ...

and

Auxerre Auxerre ( , , Burgundian language (Oïl), Burgundian: ''Auchoirre'') is the capital (Prefectures in France, prefecture) of the Yonne Departments of France, department and the fourth-largest city in the Burgundy historical region southeast of Par ...

from 1175 through 1181. His parents were Guy of Nevers and Mathilda of Grignon. Following his father's death in 1175, his mother, Mathilda, was regent during his lifetime. He died as a child in 1181. William's sister, Agnes would become heiress of Nevers.

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References

* Counts of Auxerre Counts of Nevers 1181 deaths Monarchs who died as children {{France-noble-stub