What is William IV of Holland?
[[File:Willem IV.jpg|thumb|William IV of Holland-Hainaut]] William II (1307 – 26 September 1345) was [[Count of Hainaut]] from 1337 until his death. He was also [[Count of Holland]] (as William IV) and [[Count of Zeeland]]. He succeeded his father, [[William III of holland|Count William I of Hainaut]]. While away fighting in [[Prussia]], the [[Frisian people|Frisians]] revolted. William returned home and was killed at the [[Battle of warms|Battle of Warns]]. [[Category:1307 births]] [[Category:1340s deaths]] [[Category:Counts of Holland]] [[Category:Counts of Hainaut]]