Mrs Vivien Patricia PRIDEAUX-BRUNE, née GIBSON (24 III 1944 - 31 XII 1983), the first wife (married 1971) of Peter John Nicholas PRIDEAUX-BRUNE, was the daughter of Maj Arthur Creagh GIBSON, MC (29 X 1912 - 17 XII 1970) and his wife (married 1940), Barbara Maeveen BLUNDELL BROWN (24 VII 1918 - c.2014).
Maj Arthur Gibson was the younger, but only surviving, son of Maj Thomas George GIBSON, CBE (1 I 1878 - 21 XII 1955) and his wife (married 5 VI 1907), Mary Helen ("Mollie") CREAGH (8 X 1882 - 10 VIII 1960), of that landed gentry (LG) family, of Ballygarrett (see under Brasier-Creagh in Burke's Irish Family Records (1976)).
Mrs Martha Thalia Daisy PRIDEAUX-BRUNE, née COLLINS (born 1975), the wife of Nicholas Pagan PRIDEAUX-BRUNE (born May 1975), is the daughter of Richard Jonathan COLLINS (born 9 VI 1945) and his first wife (married 14 VII 1974, divorced 1987), Diana Adeline GOEDHUIS (born 6 V 1946), the daughter of Prof Daniel GOEDHUIS (14 II 1905 - 5 X 1995), sometime Civil Air Attaché at the Netherlands Embassy, and his first wife (married 21 IV 1939), Rachel Daphne HENDERSON (12 IV 1916 - 1973), who was herself the daughter of the Hon Arnold HENDERSON (1 VII 1883 - 12 III 1933), the fifth son of the 1st Baron Faringdon.
Richard Jonathan Collins is the second of the four sons of the Rev Canon (Lewis) John COLLINS (23 III 1905 - 31 XII 1982) and his wife (married 21 X 1939), Diana Clavering ELLIOT (13 VIII 1917 - 23 V 2003), who became Dame Diana Collins on her appointment as a DBE in 1999. Mr Collins eldest brother, Sir Andrew David COLLINS (born 19 VII 1942), is a retired Justice of the High Court, and his youngest brother is the psychiatrist Dr Mark Nathaniel COLLINS (born 1 VI 1952), who is the second husband (married 1985, as his second wife) of Rosamond Philippa JESSEL (born III 1957), whose first husband (married 1980, as his first wife) was the Hon John David LEIGH-PEMBERTON (born 16 III 1955), the eldest son of the Life Peer Baron Kingsdown.
Mrs Rosamond Collins, formerly Leigh-Pemberton, née Jessel, is the fourth daughter of Oliver Richard JESSEL (24 VIII 1929 - 21 VI 2017) and his wife (married 1950), Gloria Rosalie Teresa HOLDEN (22 XII 1931 - 17 IV 2019). Oliver Jessel was the elder brother of Thomas Francis Henry ("Toby") JESSEL (11 VII 1934 - 3 XII 2018), MP (Conservative) for Twickenham, 1970-97, and they were great-grandsons of the 1st Viscount Bearsted.
It seems that Mary Thérèse PRIDEAUX-BRUNE was only married once, to Martin Rennel Charlton ("Tim") PARR (11 II 1928 - 23 IV 2016), this marriage having been registered in Bodmin in Q2 1979. Mr Parr was the younger son of Raymond Cecil PARR (8 X 1884 - 10 I 1965), of that LG family, of Grappenhall Heyes, Cheshire (which, per Burke's Family Index, last appeared in Burke's LG in the 1900 edition, but which I have found in the 1921 edition), a diplomat, and his wife (married 15 III 1913, as her first of three husbands), Andrée Manuela Alexandre Joaquina ("Audrey") BAPST (3 XI 1892 - 7 V 1940), who was the elder half-sister of the magazine editor Baron Nicolas Louis Alexandre DE GUNZBURG (12 XII 1904 - 20 II 1981).
The engagement of Henrietta Mary Audrey PARR (born 1980) to Nigel C PARKES was announced in 2013. Her sister's full maiden name was Anna Cecilia Mary Diana PARR (born 1981).
The birth of an Oscar Thomas Daniel LEATHERDALE, mother's maiden surname Parr, was registered in West Sussex in Q2 2010. I presume he is the younger brother of the Finlay Martin Brian LEATHERDALE, mother's maiden surname Parr, whose birth was registered in Hayward's Heath in Q4 2007.