Col Harry Oswald LOVELL (7 II 1902 - 23 III 1978) was married in 1928 to Mary Murray WALKER (22 IV 1900 - 21 XII 1975), daughter of Captain Frederick Murray WALKER, RN (29 VII 1862 - 7 II 1919), the third son of Colonel Sir George Gustavus WALKER, KCB (18 I 1830 - 5 VIII 1897), of that family, of Morrington formerly of Crawfordton, which, per Burke's Family Index, last appeared in Burke's Landed Gentry in the 1952 edition.
Captain Frederick Murray Walker's wife (married 19 VI 1891) was Lucy Selina SCRIVEN (1869 - 7 VII 1939), daughter of Major Horace William SCRIVEN (1843 - 5 II 1896), of that family of the Priory (per Burke's Family Index, last in BLG in 1863, but they can be found in the 1871 edition at
https://ukga.org/browse.php?action=ViewRec&DB=33&bookID=223&page=blg187101262), and his wife, Georgina Mary TEMPLE (1849 - 7 I 1936)
Sir George Gustavus Walker was MP (Conservative) for Dumfriesshire, 1865-68 and 1869-74. His third daughter, Ethel Mary WALKER, was married on 3 June 1890 to (as his second wife) Edward KNATCHBULL-HUGESSEN, 1st Baron Brabourne (29 IV 1829 - 6 II 1893).