William Cecil Slingsby1
Child of William Cecil Slingsby
Eleanor Slingsby1
From 25 April 1918, her married name became Young.
Children of Eleanor Slingsby and Geoffrey Winthrop Young
- Jocelin Slingsby Winthrop-Young+2 b. 25 Oct 1919, d. 9 Feb 2012
- Marcia Eacy Winthrop Young+2 b. 11 Mar 1925
Jocelin Slingsby Winthrop-Young1 
He was educated at Gordonstoun School, Elgin, Morayshire, Scotland.1 He was educated at University of Geneva, Geneva, Switzerland.1 He fought in the Second World War.1 He gained the rank of Lieutenant in the Royal Navy Volunteer Reserve.1 He was tutor to the Crown Prince of Greece between 1948 and 1958.1 He was Headmaster and founder between 1949 and 1959 at Anavryta School, Athens, Greece.1 He was with the Foreign Office between 1959 and 1963.1 He was appointed Officer, Order of the British Empire (O.B.E.) in 1960.1 He was awarded the Commander, Order of St. George and St. Constantine of Greece.1 He was Headmaster in 1964 at Salem School.1
Children of Jocelin Slingsby Winthrop-Young and Countess Ghislaine de la Gardie
- Mark Gustav de la Gardie-Winthrop-Young2 b. 25 Apr 1952
- Sophie de la Gardie-Winthrop-Young+2 b. 30 Jul 1954
- Geoffrey Hubert de la Gardie-Winthrop-Young2 b. 26 Dec 1960
- [S37] BP2003 volume 3, page 4275. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S6758] Sophie Weidlich, “re: Weidlich Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 9 July 2013. Hereinafter cited as “re: Weidlich Family.”
Count Gustaf de la Gardie1
Child of Count Gustaf de la Gardie
- Countess Ghislaine de la Gardie+2 d. 1987
Countess Ghislaine de la Gardie1 
From 11 March 1951, her married name became Winthrop-Young.
Children of Countess Ghislaine de la Gardie and Jocelin Slingsby Winthrop-Young
- Mark Gustav de la Gardie-Winthrop-Young2 b. 25 Apr 1952
- Sophie de la Gardie-Winthrop-Young+2 b. 30 Jul 1954
- Geoffrey Hubert de la Gardie-Winthrop-Young2 b. 26 Dec 1960
Mark Gustav de la Gardie-Winthrop-Young1
He was educated at Gordonstoun School, Elgin, Morayshire, Scotland.1 He lived in 2003 at Holbein Strasse 16, Ravensburg, Germany.1
Geoffrey Hubert de la Gardie-Winthrop-Young1
Sophie de la Gardie-Winthrop-Young1
From 1985, her married name became Weidlich.1
Child of Sophie de la Gardie-Winthrop-Young and Roger Weidlich
- Amelie Ebba Ghislaine Weidlich2 b. 1989
Roger Weidlich1
Child of Roger Weidlich and Sophie de la Gardie-Winthrop-Young
- Amelie Ebba Ghislaine Weidlich2 b. 1989
Amelie Ebba Ghislaine Weidlich1