Theodora Rosling1 
Her married name became Morrison.1 From 1944, her married name became FitzGibbon.1
- [S37] BP2003 volume 1, page 1150. See link for full details for this source. Hereinafter cited as. [S37]
Marjorie Sue Steele
Her married name became Hartford.1 Her married name became Sutton.1 She was also known as Marion Gutmann.3 From 27 August 1960, her married name became FitzGibbon.1 From 1967, her married name became FitzGibbon.1
Children of Marjorie Sue Steele and George Huntington Hartford
- Catherine Hartford2 d. 1988
- John Hartford2 b. c 1954, d. 15 Apr 2011
Child of Marjorie Sue Steele and Major Robert Louis Constantine Dillon FitzGibbon
- Oonagh Louisa Dillon Fitzgibbon4 b. 1968
- [S37] BP2003 volume 1, page 1150. See link for full details for this source. Hereinafter cited as. [S37]
- [S219] Announcements, New York Times, New York, U.S.A.. Hereinafter cited as New York Times.
- [S47] BIFR1976 page 430. See link for full details for this source. Hereinafter cited as. [S47]
- [S47] BIFR1976. [S47]
Francis George Herbert Dillon FitzGibbon1
He lived in 2003 at 46 Brondesbury Road, London, EnglandG.3
Children of Francis George Herbert Dillon FitzGibbon and Camilla Gaye Beresford
- Lily Theodora FitzGibbon3 b. 8 Jan 1987
- Samuel Frederick John FitzGibbon3 b. 24 Jun 1997
Oonagh Louisa Dillon Fitzgibbon1
John Sinclair1
Child of John Sinclair
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 20. Hereinafter cited as The New Extinct Peerage.
Frances Geraldine Dillon FitzGibbon1 
Her married name became Colvile.
Harry Morton Colvile1
He lived in 2003 at Beau Chêne, Chemin de la Souques, Aix-en-Provence, FranceG.1
Maria Dolores Dillon FitzGibbon1 
Frances Hasting FitzGibbon1
She lived in 1976 at 10 The Close, Addington Park, Maidstone, Kent, EnglandG.2
Georgette Winifred FitzGibbon1 
Her married name became Mounsey.1
