Boscawen married on 23 April 1700 in
Henry VII's Chapel,
Westminster Abbey, Charlotte Godfrey elder daughter and coheir of Colonel
Charles Godfrey, master of the jewel office and his wife
Arabella Churchill. Charlotte died on 22 March 1754, and was also buried at Penkivel. She had wanted to become a lady of the bedchamber to the wife of King
George II, and tried to bribe Lady Sundon (
Charlotte Clayton Sundon) into obtaining the post for her. Their children included: • Anne (1703/4–1749), second daughter who married
Sir Cecil Bishopp, 6th Baronet. Her children included:
Cecil Bisshopp, 12th Baron Zouche, Harriett
Lady Dunce, Anne
wife of Hon. Robert Brudenell whose son was
6th Earl of Cardigan; Charlotte
Lady Maynard, Frances
Lady Warren Maid of honour to Queen Charlotte 1761–4, Catherine
Countess of Liverpool, Baroness Hawkesbury among others. •
Hugh Boscawen, 2nd Viscount Falmouth (1707–1782), eldest son •
Edward Boscawen (1711–1761), MP, PC, Admiral, 3rd son. •
George Boscawen (1712–1775), MP, 4th son •
John Boscawen (1714–1767), MP, 5th son. • William Augustus Spencer Boscawen, MP (7 January 1750 – 1828). Son of John, and his wife Thomasine, who died before William's baptism at St James's Church, Piccadilly, on 30 January 1750. ==Death and burial==