Henry Fitzroy
Their mother, Blanche Adeliza Fitzroy, was the widow of the Hon. Charles Maynard, making them half-sisters to Daisy Greville, Countess of Warwick and Blanche, Lady Algernon Gordon-Lennox (mother to Ivy Cavendish-Bentinck, Duchess of Portland). Their maternal grandfather was Henry Fitzroy, whose father, the Reverend Lord Henry Fitzroy, was a Canon of Westminster Abbey, and grandfather was the Prime Minister Augustus FitzRoy, 3rd Duke of Grafton.