Finch-Hatton was born on 2 August 1911 to Guy Finch-Hatton, 14th Earl of Winchilsea (1885-1939) and his wife Margaretta Armstrong Drexel (1885-1952).
His maternal grandfather was banker Anthony J. Drexel Jr. (1864-1934) of Philadelphia,[REF] and his great-grandfather was Anthony Joseph Drexel (1826-1893), the founder of Drexel, Morgan & Co., along with J. P. Morgan, in New York in 1871, as well as the founder of Drexel University in 1891 [REF].