[a] She was the fourth daughter and fifth child of John Churchill, 1st Duke of Marlborough, and Sarah Jenyns.

Elizabeth's godparents were Anna Charlotte de Vic, Baroness Frescheville and Barbara Villiers, Viscountess Fitzhardinge.

[3] According to an Act of Parliament on 21 June 1706, allowing the 1st Duke's daughters to inherit his English title, Elizabeth became co-heir of her father like her other sisters Henrietta, Anne and Mary.

[7] On 9 February 1703, at fourteen years old, Elizabeth Churchill married Scroop Egerton, 4th Count of Bridgewater.

"[15] Hearing the news of his beloved daughter's death, the Duke of Marlborough fainted, hitting his head on a marble mantlepiece.