He died 25 Jan 2024 (Ancestry). He was s of AVM Cresswell Montagu CLEMENTI CB CBE RAF 1918-81 and Susan 1918-2006 d of Sir Edward Henry PELHAM KCB 1876-1949 (gt gs of 2 Earl of CHICHESTER 1756-1826) and Hon Irene LUBBOCK 1886-1961 d of 1 Baron AVEBURY 1834-1913 and his 2 w Alice Augusta Larentia Lane FOX-PITT c1862-1947, scion of gentry and peerage families. He m 1 1976 Pamela Juliette NOLLAN d 1992 and had a son (Richard Adam CLEMENTI b 1978). He m 2 1994 Frances Kathleen Chivers (née Parr).