Margaret Guise Yates1 
From 16 May 1953, her married name became Irvine-Fortescue.
Children of Margaret Guise Yates and James William Irvine-Fortescue
- Major Grenville Archer Irvine-Fortescue+3 b. 4 Nov 1954
- Rachel Sarah Irvine-Fortescue3 b. 13 Sep 1956
- Henry Boswell Irvine-Fortescue3 b. 19 Jun 1958
- James Robert Irvine-Fortescue+3 b. 10 Sep 1960
Major Grenville Archer Irvine-Fortescue1
He was educated at Fettes College, Edinburgh, Midlothian, ScotlandG.1 He gained the rank of Major in the Gordon Highlanders.1 He held the office of Deputy Lieutenant (D.L.) of Aberdeenshire on 20 August 2018.3
Children of Major Grenville Archer Irvine-Fortescue and Virginia Townsend
- Alexander Thomas Irvine-Fortescue2 b. 8 May 1987
- Simon Archer Irvine-Fortescue2 b. 15 Dec 1988
- Juliet Irvine-Fortescue2 b. 3 Aug 1991
- Edmund William Irvine-Fortescue2 b. 1 May 1995
Patrick William Townsend1
Child of Patrick William Townsend
Virginia Townsend1
From 1985, her married name became Irvine-Fortescue.
Children of Virginia Townsend and Major Grenville Archer Irvine-Fortescue
- Alexander Thomas Irvine-Fortescue2 b. 8 May 1987
- Simon Archer Irvine-Fortescue2 b. 15 Dec 1988
- Juliet Irvine-Fortescue2 b. 3 Aug 1991
- Edmund William Irvine-Fortescue2 b. 1 May 1995
Alexander Thomas Irvine-Fortescue1
Simon Archer Irvine-Fortescue1
Edmund William Irvine-Fortescue1
Juliet Irvine-Fortescue1
Henry Boswell Irvine-Fortescue1
He graduated from St. Andrews University, St. Andrews, Fife, ScotlandG, in 1982 with a Master of Arts (M.A.)1 He lived in 2003 at The Old Coach House, Kingcausie, Maryculter, Aberdeenshire, ScotlandG.1