[5] Gertrude married Ferranti on 24 April 1888 at St Dominic's Priory Hampstead and they had seven children: Zoë Vanda Marie (1889–1978); Basil (1891–1917); Gerard Vincent (1893–1980); Vera Catherine (1898–1993); Yolanda (1902–1919); Denis (1908–1992) and Yvonne Teresa (1913-1988).

[6] Her grandson, Basil de Ferranti, was a Conservative politician who represented Morecambe and Lonsdale in the late nineteen fifties and early sixties.

[8] According to an article in the July 1927 issue of the Electrical Age for Women, Baslow Hall made use of waste heat and used hot water for energy storage.

[14][15] When Gertrude de Ferranti attended the World Power Conference in Washington in 1936, she was described as a "lady tycoon" and the press noted that she was half-owner of Britain's largest privately owned electrical engineering organisation.

[17][18] He was born in Greymouth, New Zealand, and had a military career with British imperial troops in Africa in the late nineteeth and early twentieth centuries.