Lucian Francis Guinness1
Ngora.3 Uganda.)3 He was educated at Rugby School, Rugby, Warwickshire, EnglandG.1 He was educated at King’s College, Cambridge University, Cambridge, Cambridgeshire, EnglandG.1
Children of Lucian Francis Guinness and Dr. Elizabeth Cosgrave
- Paul Rohio Guinness2 b. 20 Sep 1969
- Richard Mackay Guinness2 b. 24 Dec 1970
- Lucy Frances Guinness2 b. 10 May 1973
Dr. C. P. Cosgrave1
Child of Dr. C. P. Cosgrave
Dr. Elizabeth Cosgrave1
From 5 October 1968, her married name became Guinness.
Children of Dr. Elizabeth Cosgrave and Lucian Francis Guinness
- Paul Rohio Guinness2 b. 20 Sep 1969
- Richard Mackay Guinness2 b. 24 Dec 1970
- Lucy Frances Guinness2 b. 10 May 1973
Paul Rohio Guinness1
Richard Mackay Guinness1
Lucy Frances Guinness1
Geoffrey Gwynne Guinness1 
Children of Geoffrey Gwynne Guinness and Severine Macelle Curntchet
- Victor Edward Gwynne Guinness+3 b. 26 Jul 1890, d. 25 Nov 1979
- Robert Celestin Guinness4 b. 1893, d. 29 Jun 1970
- Robert Celestin Guinness3 b. 1893, d. 29 Jun 1970
Celestin Curntchet1
Child of Celestin Curntchet
- Severine Macelle Curntchet+2 d. 23 Jul 1923
Severine Macelle Curntchet1 
From 1886, her married name became Guinness.
Children of Severine Macelle Curntchet and Geoffrey Gwynne Guinness
- Victor Edward Gwynne Guinness+2 b. 26 Jul 1890, d. 25 Nov 1979
- Robert Celestin Guinness4 b. 1893, d. 29 Jun 1970
- Robert Celestin Guinness2 b. 1893, d. 29 Jun 1970
Victor Edward Gwynne Guinness1 
Cmd 1939 Ch Engr Scottish.3 War 1111 served in World 5 Ch Engr N Ireland Dist (22B Rawlinson Road.3 He was Lancashire.3 Southport.3 He was educated at Wellington College, Crowthorne, Berkshire, EnglandG.1 He was educated at Royal Military Academy, Woolwich, Kent, EnglandG.1 He fought in the First World War.1 He fought in the Second World War.1 He retired from the military in 1945, with the rank of Colonel, late of the Royal Engineers.1
Children of Victor Edward Gwynne Guinness and Stella Howsin
- Ann Severine Guinness+2 b. 18 Jul 1939, d. 24 Oct 2014
- David Robert Mancknois Guinness2 b. 23 Jan 1948
- [S37] BP2003 volume 2, page 1697. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S47] BIFR1976 page 530. See link for full details for this source. Hereinafter cited as. [S47]
- [S266] World War II Unit Histories – Officers, online http://www.unithistories.com/units_index/default.asp?file=../officers/personsx. Hereinafter cited as World War II Unit Histories – Officers.