Later they became one of the few married couples each of whom held a peerage in their own right, and whose descendants inherited titles through both. They had eight children:
The Hon. Michael-John Ulick Knatchbull (born 24 May 1950), producer and editor, married Melissa Clare Owen (born 12 November 1960), daughter of judge Sir John Arthur Dalziel Owen, on 1 June 1985 and had one daughter; divorced in 1997; married Susan Penelope "Penny" Jane Henderson née Coates (born 23 October 1959), daughter of Stephen Cedric Coates, a civil engineer and businessman, on 6 March 1999 and had one daughter; divorced on 13 February 2006.
The Hon. Anthony Knatchbull (born/died 6 April 1952)
Lady Joanna Edwina Doreen Knatchbull (born 5 March 1955), married French Baron Hubert Pernot du Breuil (2 February 1956 – 6 September 2004) on 3 November 1984 and had one daughter; divorced in 1995; married Azriel Zuckerman (born 18 January 1943 in Bucharest, Romania, and educated at the University of Oxford) on 19 November 1995 and had one son.
The Hon. Philip Wyndham Ashley Knatchbull (born 2 December 1961), married Atalanta Verekernée Cowan (born 20 June 1962), daughter of John Cowan, on 16 March 1991 and had two daughters, including Daisy Knatchbull; married Wendy Amanda Willis née Leach (born 20 July 1966), daughter of Robin H. Leach, of Ugley Park, Ugley, Essex, on 29 June 2002 and had two sons.[4]
The Hon. Nicholas Timothy Charles Knatchbull (18 November 1964 – 27 August 1979), killed by an IRA bomb.
The Hon. Timothy Nicholas Sean Knatchbull (born 18 November 1964), married Isabella Julia Norman (born 9 January 1971), a great-great-granddaughter of the 4th Earl of Bradford, on 11 July 1998 and had five children.[5]
As Lady Brabourne during her father's lifetime, her immediate family became closely involved in the consideration of a future consort for her first cousin once-removed, Charles, Prince of Wales. In early 1974, Lord Mountbatten began corresponding with the eldest son of Queen Elizabeth II and Prince Philip about a potential marriage to Lady Brabourne's daughter, Amanda.[6] Charles wrote to Lady Brabourne (who was also his godmother), about his interest in her daughter, to which she replied approvingly, though suggesting that a courtship was premature.[7] Amanda Knatchbull declined the marriage proposal of Charles in 1980, following the assassination of her grandfather.[8]
In 1973 she was appointed Deputy Lieutenant for the County of Kent; she was also a serving magistrate and was involved with numerous service organisations including SOS Children's Villages UK, of which she was a Patron; the Order of St John, of which she was a Dame; and the Countess Mountbatten's Own Legion of Frontiersmen of the Commonwealth, of which she was a Patron.[12]
Patricia was in the boat which was blown up by the IRA off the shores of Mullaghmore, County Sligo, in August 1979, killing her 14-year-old son Nicholas; her father; her mother-in-law, the Dowager Baroness Brabourne; and 15-year-old Paul Maxwell, a boat-boy from County Fermanagh. She, her husband, and their son Timothy were injured but survived the attack.[14] Following the incident the Countess became Patron and, later, President of The Compassionate Friends, a self-help charitable organisation of bereaved parents in the UK.[15]
In June 2012, at the time of Queen Elizabeth II's first visit to the Republic of Ireland, Countess Mountbatten said the Queen had her full support for meeting Martin McGuinness, who had been a high-ranking member of the IRA. "I think it's wonderful ... I'm hugely grateful that we have come to a point where we can behave responsibly and positively", she is reported to have said.[16] In September 2012, she unveiled a memorial to the work of the Combined Operations Pilotage Parties at Hayling Island in Hampshire.[17]
*Not Mountbatten or Battenberg by birth. Adopted the surname Mountbatten from his maternal line on abandoning his patrilineal Greek and Danish princely titles.