His paternal grandparents were Henry Lowther, 3rd Earl of Lonsdale and Emily, Countess Lowther (née Emily Susan Caulfeild), the daughter of St George Caulfeild of Donamon Castle of Roscommon, Ireland.
[2] He was appointed a Page of Honour on 7 April 1908[3] and served in that office until 25 March 1913.
[5] Lowther returned to the family estates after the war, dwelling in Clifton Hall, Westmorland.
[6] Like many of his family, he was influential in local affairs, serving as High Sheriff of Westmorland in 1930,[7] and being appointed honorary colonel of the 4th Battalion, The Border Regiment on 19 December 1931.
[1] On 1 February 1922, Lowther married Muriel Frances Farrar, daughter of Sir George Herbert Farrar, 1st baronet, of Chicheley Hall Bucks, by whom he had three children:[10] Upon the death of his uncle in 1944, Anthony assumed the style of Viscount Lowther as heir apparent to the Earldom.