George V

George V was the King of the United Kingdom who succeeded his father Edward VII. Following his death in 1936, George V was succeeded by his eldest son Edward VIII, who reigned briefly until he was succeeded by his younger brother George VI. (PDA: Players)

When the Tenth Doctor found that Edward VII had disappeared along with Balmoral Castle in 1902, he warned that the future of the royal family, along with the rest of history, was threatened as there would be no George V nor any of his successors. (QR: Revenge of the Judoon)

In 1915, when Walther Schwieger took the Fifth Doctor aboard his submarine, he noted that he looked like King George about to play cricket. (BFA: The Sirens of Time)