George Frederick
... that the Thoroughbred racehorse George Frederick was named after the future King George V, and won the 1874 Derby Stakes on the young prince's birthday?
... that the Thoroughbred racehorse <b id="mwATk"><a href="./George_Frederick_(horse)" id="mwATo" rel="mw:WikiLink" title="George Frederick (horse)">George Frederick</a></b> was named after the future <a class="mw-redirect" href="./King_George_V" id="mwATs" rel="mw:WikiLink" title="King George V">King George V</a>, and won the 1874 <a href="./Epsom_Derby" id="mwATw" rel="mw:WikiLink" title="Epsom Derby">Derby Stakes</a> on the young prince's birthday?