Muriel Douglas-Pennant, Viscountess Daventry1 
Her married name became Fitzroy. She was appointed Commander, Order of the British Empire (C.B.E.) in 1918.1 She was appointed Dame of Grace, Most Venerable Order of the Hospital of St. John of Jerusalem (D.G.St.J.)1 She was created 1st Viscountess Daventry, of Daventry, co. Northampton [U.K.] on 6 May 1943, with a special remainder to heirs of her body.1
Children of Muriel Douglas-Pennant, Viscountess Daventry and Captain Rt. Hon. Edward Algernon FitzRoy
- Robert Oliver Fitzroy, 2nd Viscount Daventry+1 b. 10 Jan 1893, d. 19 Jan 1986
- Hon. Nancy Jean Fitzroy1 b. 31 May 1894, d. Feb 1984
- Captain Michael Algernon Fitzroy1 b. 27 Jun 1895, d. 15 Apr 1915
- Commander John Maurice FitzRoy Newdegate+1 b. 20 Mar 1897, d. 7 May 1976
Captain John Fitzhardinge Paul Butler, V.C.1

He fought in the First World War.1 He was awarded the Distinguished Service Order (D.S.O.)1 He was awarded the Victoria Cross (V.C.) on 23 August 1915, for his actions on 17 November 1914 and 27 December 1914. “In the Cameroons with a party of 13 men he went into thick bush and attacked and defeated a much greater force of the enemy. A machine gun and many loads of ammunition were captured. Whilst on patrol duty with a few men, he swam the Ekin River under heavy fire, carried out his reconnaissance on the far bank and swam back to safety.”3
Robert Oliver Fitzroy, 2nd Viscount Daventry1 
Robert Oliver Fitzroy, 2nd Viscount Daventry usually went by his middle name of Oliver.1 He was educated at Royal Naval College, Osborne, Isle of Wight, EnglandG.1 He was educated at Royal Naval College, Dartmouth, Devon, EnglandG.1 He fought in the First World War.1 He gained the rank of Captain in the Royal Navy.1 He fought in the Second World War, where he was mentioned in despatches.1 He was Director of Minesweeping between 1940 and 1943.1 He was commander of the H.M.S. Rodney between 1943 and 1946.1 He held the office of High Sheriff of Rutland in 1956.1 He succeeded as the 2nd Viscount Daventry, of Daventry, co. Northampton [U.K., 1943] on 8 July 1962.1
Children of Robert Oliver Fitzroy, 2nd Viscount Daventry and Grace Zoë Guinness
- Hon. Mary Angela FitzRoy+1 b. 4 Nov 1919, d. 1984
- Hon. Olivia Gwyneth Zoë FitzRoy+3 b. 27 May 1921, d. 24 Dec 1969
- Hon. Katherine Susan FitzRoy+3 b. 24 Aug 1923
- Hon. Barbara Helen FitzRoy+3 b. 10 Dec 1928
- Hon. Amelia Grace FitzRoy+3 b. 26 Mar 1930, d. b May 2001
Grace Zoë Guinness1 
Her married name became Fitzroy. After her marriage, Grace Zoë Guinness was styled as Viscountess Daventry on 8 July 1962. At 36 Swan Court, London, England, (an unknown value.)2
Children of Grace Zoë Guinness and Robert Oliver Fitzroy, 2nd Viscount Daventry
- Hon. Mary Angela FitzRoy+3 b. 4 Nov 1919, d. 1984
- Hon. Olivia Gwyneth Zoë FitzRoy+3 b. 27 May 1921, d. 24 Dec 1969
- Hon. Katherine Susan FitzRoy+3 b. 24 Aug 1923
- Hon. Barbara Helen FitzRoy+3 b. 10 Dec 1928
- Hon. Amelia Grace FitzRoy+3 b. 26 Mar 1930, d. b May 2001
Hon. Mary Angela FitzRoy1 
Her married name became Musker. From 22 October 1962, her married name became Mayon-White.2
Children of Hon. Mary Angela FitzRoy and Major Anthony Dermot Melloney Musker
- Charles Dermot FitzRoy Musker+1 b. 10 Oct 1941
- Belinda Mary Musker+1 b. 27 Nov 1942, d. 19 Mar 2019
- Fiona Zoe Musker+1 b. 23 Oct 1945
- Herbert Oliver FitzRoy Musker+1 b. 21 Nov 1948
- Robert Anthony Musker1 b. 14 Jun 1952
- [S37] BP2003 volume 1, page 1046. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S1122] Peerage News, online http://peeragenews.blogspot.co.nz/. Hereinafter cited as Peerage News.
Major Anthony Dermot Melloney Musker1 
Major Anthony Dermot Melloney Musker usually went by his middle name of Dermot.1
Children of Major Anthony Dermot Melloney Musker and Hon. Mary Angela FitzRoy
- Charles Dermot FitzRoy Musker+1 b. 10 Oct 1941
- Belinda Mary Musker+1 b. 27 Nov 1942, d. 19 Mar 2019
- Fiona Zoe Musker+1 b. 23 Oct 1945
- Herbert Oliver FitzRoy Musker+1 b. 21 Nov 1948
- Robert Anthony Musker1 b. 14 Jun 1952
- [S37] BP2003 volume 1, page 1046. See link for full details for this source. Hereinafter cited as. [S37]
Major Herbert Musker1 
He was appointed Officer, Order of the British Empire (O.B.E.)3 He lived at Rushford Hall, Thetford, Norfolk, EnglandG.1
Child of Major Herbert Musker
- Major Anthony Dermot Melloney Musker+1 d. 8 Aug 1959
Child of Major Herbert Musker and Nora Lonsdale Berry
- James Herbert Lonsdale Musker+2 b. 1 Apr 1907, d. 16 Aug 1966
- [S37] BP2003 volume 1, page 1046. See link for full details for this source. Hereinafter cited as. [S37]
- [S1122] Peerage News, online http://peeragenews.blogspot.co.nz/. Hereinafter cited as Peerage News.
- [S37] BP2003. [S37]
Charles Dermot FitzRoy Musker1
He was educated at Eton College, Windsor, Berkshire, EnglandG.1
Children of Charles Dermot FitzRoy Musker and Caroline Theresa Digby
- Dermot Henry Musker1 b. 9 Nov 1964
- Emily Mary Musker1 b. 16 Sep 1972
- Rupert Anthony Musker1 b. 14 Jun 1975
- Chloe Diana Leopoldine Musker1 b. 12 Jun 1979
- [S37] BP2003 volume 1, page 1046. See link for full details for this source. Hereinafter cited as. [S37]
Herbert Oliver FitzRoy Musker1
Herbert Oliver FitzRoy Musker usually went by his middle name of Oliver.2 He was educated at Eton College, Windsor, Berkshire, EnglandG.2 He lived in 2003 at Malcolm House, Batsford, Moreton-in-Marsh, Gloucestershire, EnglandG.2
Children of Herbert Oliver FitzRoy Musker and Victoria (?)
- Claud James FitzRoy Musker+2 b. 1977
- Sam Musker2 b. 1982
Robert Anthony Musker1
He was educated at Milton Abbey School, Milton Abbas, Dorset, EnglandG.1 He lived in 2003 at Valley Farm, Brancaster Staithe, Norfolk, EnglandG.1
- [S37] BP2003 volume 1, page 1046. See link for full details for this source. Hereinafter cited as. [S37]