Question: When is Anne, Princess Royal And Princess Of Orange's husband's birthday?
Sentence (from "William IV, Prince of Orange"): William IV (Willem Karel Hendrik Friso; 1 September 1711 – 22 October 1751) was Prince of Orange from birth and the first hereditary Stadtholder of all the United Provinces of the Netherlands from 1747 till his death in 1751.
Relevant evidence: Yes