Lord Allendale married Lady Alexandrina Vane-Tempest, daughter of
George Vane-Tempest, 5th Marquess of Londonderry, on 12 November 1889. They had six children: •
Wentworth Henry Canning Beaumont, 2nd Viscount Allendale (6 August 1890 – 16 December 1956). • Margaret Helen Beaumont (13 November 1892 – 10 June 1958), married the
5th Earl Fortescue and had issue. • Aline Mary de Burgh Beaumont (23 April 1895 – 15 April 1967). • Diane Beaumont (1896–31 January 1897). •
Ralph Edward Blackett Beaumont (12 February 1901 – 18 September 1977). • Agatha Violet Beaumont (26 December 1903 – 15 January 1994). Lord Allendale died in London in December 1923, aged 63, and was buried in the grounds of
Bretton Hall, near
Wakefield. ==References==