James Loudon1 
Child of James Loudon
- Thomas Loudon+1 b. c 1720
Elspet Whyte1
Child of Elspet Whyte and Thomas Loudon
- John Loudon+1 b. 22 Nov 1751, d. Nov 1835
Mary Cant1 
From 22 August 1774, her married name became Loudon.1
Child of Mary Cant and John Loudon
- Alexander Loudon+1 b. 20 Nov 1789, d. 12 Oct 1839
Jane Bowman1 
From 12 March 1803, her married name became Loudon.1
Susanna Gaspardina Valck1 
From 10 April 1815, her married name became Loudon.1
Children of Susanna Gaspardina Valck and Alexander Loudon
- Hugh Hope Loudon+1 b. 19 Oct 1818, d. 22 Feb 1891
- John Francis Loudon1 b. 21 May 1821, d. 24 Aug 1895
- Alexander Loudon+1 b. 2 Dec 1822, d. 26 Oct 1868
- Jonkheer James Loudon+1 b. 8 Jun 1824, d. 31 May 1900
Jan Arent Valck1 
Child of Jan Arent Valck and Johanna Helena Beylon
- Susanna Gaspardina Valck+1 b. 10 Apr 1801, d. 30 Nov 1828
Johanna Helena Beylon1
Child of Johanna Helena Beylon and Jan Arent Valck
- Susanna Gaspardina Valck+1 b. 10 Apr 1801, d. 30 Nov 1828
Pauline Ignatia de Kock van Leeuwen1 
From 24 March 1841, her married name became Loudon.1
Child of Pauline Ignatia de Kock van Leeuwen and Hugh Hope Loudon
- John Francis Loudon1 b. 17 Apr 1844, d. 23 Jul 1881
Aart de Kock van Leeuwen1 
Children of Aart de Kock van Leeuwen and Suzanna Ignatia Reynst
- Marianna Suzanna Lucia de Kock van Leeuwen+1 b. 4 Oct 1821, d. 6 Dec 1912
- Pauline Ignatia de Kock van Leeuwen+1 b. 31 Jan 1826, d. 6 Mar 1846
- Suzanna Ignatia de Kock van Leeuwen+1 b. 18 Apr 1834, d. 6 Sep 1889
Suzanna Ignatia Reynst1 
Children of Suzanna Ignatia Reynst and Aart de Kock van Leeuwen
- Marianna Suzanna Lucia de Kock van Leeuwen+1 b. 4 Oct 1821, d. 6 Dec 1912
- Pauline Ignatia de Kock van Leeuwen+1 b. 31 Jan 1826, d. 6 Mar 1846
- Suzanna Ignatia de Kock van Leeuwen+1 b. 18 Apr 1834, d. 6 Sep 1889
