He was s of 23rd Lord BORTHWICK 1905-96 and Margaret Frances 1911-76 d of Alexander Campbell CORMACK [1873-1931 (shipowner) and Louisa Margaret GLYNN c1880-1959]. He m 1974 Adelaide b 1945 d of Archy BIRKMYRE 1904-92 (s of Sir Archibald BIRKMYRE 1st Bt 1875-1935) and Doreen 1913-2005 d of Robert BARCLAY 1882-1949 of Kilbirnie, Ayrshire by his 27 June 1912 m ref 644/11/252 Anderston to Alice Adelaide MATHIESON 1886-1976, and had two daus. His twin brother succeeds him.
JAMES HENRY ALEXANDER Borthwick of Glengelt 25th Lord BORTHWICK has yet to establish claim, b 14 Nov 1940 (yr twin s of 23rd Lord above): m 1972 Elspeth 1939-2018 d of Lt-Col Allan Dunn MACCONACHIE 1908-97 and Elizabeth Theodora 1909-90 d of Theodore Henderson MOLESWORTH 1872-1955 (3xgt gs of 1st Viscount MOLESWORTH 1656-1725) and Ethel Alexandra UPTON 1876-1955, and had issue
SON LIVING
Hon MALCOLM HENRY (soon to be Master of Borthwick) b 4 Aug 1973: m 2002 Alexandra Catriona b c1973 reg Q1 London d of Garry WATSON of Nelandrig, Midlothian, and has issue (ARCHIE DEXTER b 10 July 2007, Oscar Samuel b 2011, Isobel Olivia b 2008).