Eugenie Loudon1 
Cecile Loudon1 
From 14 November 1888, her married name became Danckelman.1
Heinrich Eberhard Carl Wilhelm Ulrich Graf von Danckelman1 
Eberhard Graf von Danckelman1 
Child of Eberhard Graf von Danckelman and Hertha Charlotte Gräfin von Moltke
- Heinrich Eberhard Carl Wilhelm Ulrich Graf von Danckelman1 b. 1862, d. 30 May 1934
Hertha Charlotte Gräfin von Moltke1 
Child of Hertha Charlotte Gräfin von Moltke and Eberhard Graf von Danckelman
- Heinrich Eberhard Carl Wilhelm Ulrich Graf von Danckelman1 b. 1862, d. 30 May 1934
Jonkheer Dr. John Loudon1 
He held the office of Minister for Foreign Affairs [The Netherlands].1 He held the office of Dutch Ambassador to France.1
Lydia Edith Eustis1 
From 29 January 1906, her married name became Loudon.1
Jonkheer Hugo Loudon1 
He was co-founder of Royal Dutch Shell.1
Children of Jonkheer Hugo Loudon and Anna Petronella Alida van Marken
- Jonkheer James Willem Loudon+1 b. 27 Jan 1904, d. 24 Jul 1973
- Jonkheer John Hugo Loudon+1 b. 27 Jun 1905, d. 4 Feb 1996
- Jonkheer Hugo Alexander Loudon+1 b. 30 Oct 1908, d. 18 Sep 1944
Anna Petronella Alida van Marken1 
From 26 March 1903, her married name became Loudon.1
Children of Anna Petronella Alida van Marken and Jonkheer Hugo Loudon
- Jonkheer James Willem Loudon+1 b. 27 Jan 1904, d. 24 Jul 1973
- Jonkheer John Hugo Loudon+1 b. 27 Jun 1905, d. 4 Feb 1996
- Jonkheer Hugo Alexander Loudon+1 b. 30 Oct 1908, d. 18 Sep 1944
Margarethe Katharine Osieck1 
From 5 January 1932, her married name became Loudon.1
Children of Margarethe Katharine Osieck and Jonkheer James Willem Loudon
- Margaretha Eugénie Adrienne Loudon1 b. 25 Apr 1934
- Jonkheer James Alexander Loudon+1 b. 13 Aug 1935, d. 23 Mar 1987
- Jonkvrouwe Lydia Frederika Loudon+1 b. 29 Oct 1936
- Jonkheer Erik Hugo Loudon+1 b. 5 Aug 1938
- Jonkheer James Theodore Loudon1 b. 18 Jul 1940
- Eugenie Mary Loudon+1 b. 22 Jun 1941
- Jonkheer Ronald Henry Loudon+1 b. Sep 1942