Lopes was married to Helen Dawson, only daughter of Lt.-Col. Edward Alfred Finch Dawson of
Launde Abbey and the former Myra Battiscombe (eldest daughter of Maj. W.B. Battiscombe). Together, they were the parents of two sons and one daughter: • Hon. Myra Bertha Ernestine Lopes (1937–1979) •
Henry Massey Lopes, 3rd Baron Roborough (1940–2015), who married Robyn Carol Zenda Bromwich, eldest daughter of John Bromwich, of
Bacchus Marsh in
Victoria,
Australia, in 1968. They divorced in 1986 and he married, his first cousin once removed, Sarah Anne Pipon Baker (b. 1951), a daughter of Colin Harris Baker and Penelope Elizabeth Pipon (eldest daughter of Vice-Admiral Sir
James Murray Pipon and Hon. Bertha Lopes, a daughter of
Henry Lopes, 1st Baron Roborough) in 1986. •
Massey Lopes, 4th Baron Roborough • Henry Massey Peter Lopes • Ralph George Franco Lopes • Olivia Jean Sorell Lopes • Hon. George Edward Lopes (b. 1945), who married Hon. Sarah Violet
Astor, daughter of
Gavin Astor, 2nd Baron Astor of Hever and
Lady Irene Haig. • Harry Lopes, who married
Laura Parker Bowles. • Eliza Lopes • Gus Lopes • Louis Lopes Lord Roborough died on 30 June 1992.
Descendants Through his son George, he was a grandfather of Harry Marcus George Lopes (b. 1977), who was married on 6 May 2006 to
Laura Parker Bowles, daughter of
Andrew Parker Bowles and
Camilla Shand (later Queen Camilla after her wedding to
King Charles III), at St. Cyriac's Church,
Lacock,
Wiltshire. ==Coat of arms==