Scion of the
Irish Butler dynasty, his great-great-grandfather was the
13th Baron Dunboyne (1780–1850). His father, St John Henry Arcedeckne-Butler (1868–1914) married in 1896 Maud, daughter of Captain Albert Money, late
Royal Canadian Rifle Regiment, of Little Stodham House,
Liss, Hampshire, and sister of Brigadier-General
Noel Money. In 1929 he married Ethel Helen Nesbitt Walker (1905–1953), daughter of Colonel Reginald Selby Walker (killed in action 1918), • Christal Synolda Arcedeckne-Butler, born 1938, married 1961 Geoffrey William Medcalf (died 2009), having issue. The Arcedeckne-Butlers are in
remainder to the
Dunboyne peerage title. ==Arms==