His mother was Katherine, daughter of Sir George Cayley, 6th Baronet, while Wentworth Beaumont, 1st Baron Allendale, was his first cousin.
His father died when he was one year old and in 1845 his mother married as her second husband James Anlaby Legard.
[1] He sat as Member of Parliament for the West Riding of Yorkshire South from 1865 to 1874 and for Colne Valley from 1885 to 1892.
He was also an Honorary Colonel in the 2nd Volunteer Battalion of the West Riding Division and a vice patron of the Yorkshire Archaeological Society.
Beaumont married Maria Johanna, daughter of William Garthorpe, in 1857.