Peerage Record – 50550

     Sir David Arthur Geoffrey Mackworth, 9th Bt. was born on 13 July 1912.¹ He was the son of Vice-Admiral Geoffrey Mackworth and Noel Mabel Langford.² He married, firstly, Mary Alice Robinson-Smith Grylls, daughter of Thomas Henry Grylls, on 20 November 1941.¹ He and Mary Alice Robinson-Smith Grylls were divorced in 1971.¹ He married, secondly, Beryl Joan Cross, daughter of Pembroke Henry Cockayn Cross, on 11 December 1973.¹ He died on 8 February 1998 at age 85.¹
     He was educated at Farnborough School, Nottingham, Nottinghamshire, England^G.¹ He was educated at Royal Naval College, Darmouth, Devon, England.¹ He was naval advisor to the Director of Guided Weapon R & D, Ministry of Supply between 1946 and 1949.¹ He was registered as a member of the Royal Institute Navigation.¹ He was managing director of South Coast Rod Rigging Company.¹ He succeeded as the 9th Baronet Mackworth, of the Gnoll, Glamorgan [G.B., 1776] on 18 November 1952.¹ He retired from the military in 1956, with the rank of Commander, late of the Royal Navy.¹

     Thomas Henry Grylls lived at Bloomsbury, London, England.¹

     Mary Alice Robinson-Smith Grylls was the daughter of Thomas Henry Grylls.² She married Sir David Arthur Geoffrey Mackworth, 9th Bt., son of Vice-Admiral Geoffrey Mackworth and Noel Mabel Langford, on 20 November 1941.¹ She and Sir David Arthur Geoffrey Mackworth, 9th Bt. were divorced in 1971.¹ She died in 1993.¹
     From 20 November 1941, her married name became Mackworth.

     Sir Digby John Mackworth, 10th Bt. was born on 2 November 1945.¹ He was the son of Sir David Arthur Geoffrey Mackworth, 9th Bt. and Mary Alice Robinson-Smith Grylls.² He married Antoinette Francesca McKenna, daughter of Henry James McKenna, on 26 August 1971.¹ He died on 17 July 2018 at age 72.³
     He was educated at Wellington College, Crowthorne, Berkshire, England.¹ He gained the rank of Lieutenant in 1968 in the AAAC (helicopter pilot), 28 Commonwealth Infantry Brigade Malaysia and Singapore.¹ He fought in the Vietnam War between 1970 and 1971, with 161 Flight.¹ He was pilot with Iranian Helicopters (Bristow) between 1972 and 1976.¹ He was registered as a Member, Royal Aeronautical Society (M.R.Ae.S.)¹ He was with British Airways Helicopters, North Sea between 1977 and 1989.¹ He was pilot with British Airways Heathrow between 1989 and 2000.¹ He held the office of Justice of the Peace (J.P.) for Oxfordshire.¹ He succeeded as the 10th Baronet Mackworth, of the Gnoll, Glamorgan [G.B., 1776] on 8 February 1998.² He was with Easyjet Luton in 2000.² He lived in 2003 at Blagrove Cottage, Fox Lane, Boars Hill, Oxfordshire, England^G.¹

     Betty Mabel Mackworth was born on 29 April 1911.¹ She is the daughter of Vice-Admiral Geoffrey Mackworth and Noel Mabel Langford.²

     Lorna Alice Mackworth was born on 16 July 1918.¹ She is the daughter of Vice-Admiral Geoffrey Mackworth and Noel Mabel Langford.²

     Katherine Whyte married James Leslie Partington, son of James Partington and Charlotte Warburton Pearce, in 1905 at Subiaco, Perth, Western Australia, Australia^G.¹
     From 1905, her married name became Partington.¹

     John Dolben Mackworth was born on 26 June 1887.¹ He was the son of Sir Arthur William Mackworth, 6th Bt. and Alice Kate Cubitt.² He married Marianne Annette Sillem, daughter of H. W. Sillem, on 8 April 1913.¹ He died on 5 September 1939 at age 52.¹
     He graduated from Corpus Christi College, Oxford University, Oxford, Oxfordshire, England^G, with a Master of Arts (M.A.)¹ He was awarded the Chevalier, Ordre national de la Légion d’honneur.¹ He was appointed Commander, Order of the British Empire (C.B.E.) in 1918.¹ He gained the rank of Colonel in the Royal Air Force and Queen’s Royal Regiment.¹

     H. W. Sillem lived at The Pines, Horsell, Surrey, England.¹

     Marianne Annette Sillem was born circa 1887.¹ She was the daughter of H. W. Sillem.² She married John Dolben Mackworth, son of Sir Arthur William Mackworth, 6th Bt. and Alice Kate Cubitt, on 8 April 1913.¹ She died on 19 August 1968.¹
     From 8 April 1913, her married name became Mackworth.