King of Greece Constantine I Oldenburg
1868 - 1923 (54 years)(
= Descendancy chart to this point, 
= Expand, 
= Collapse)
- 1 King of Greece Constantine I Oldenburg [1] b. 02 Aug 1868 d. 11 Jan 1923
- Queen of Greece Sofie Dorothea Ulrike Alice b. 14 Jun 1870 d. 13 Jan 1932
- 2 Catherine Oldenburg [1.1]
- 2 King of Greece George Oldenburg, II [1.2] b. 19 Jul 1890 d. 1 Apr 1947
- + Princess Elizabeth of Romania Hohenzollern b. 12 Oct 1894 d. 14 Nov 1956
- + Princess Elizabeth of Romania Hohenzollern b. 12 Oct 1894 d. 14 Nov 1956
- 2 King of Greece Alexander Oldenburg, I [1.3] b. 1 Aug 1893 d. 25 Oct 1920
- Aspasia Manos b. 04 Sep 1896 d. 07 Aug 1972
- 3 Princess of Greece And Denmark Alexandra [1.3.1] b. 1921 d. 1993
- King of Yugoslavia Peter, II b. 6 Sep 1923 d. 3 Nov 1970
- 4 Crown Prince of Yugoslavia Alexander [1.3.1.1]
- Princess Donna Maria Da Gloria of Orleans-Braganza
- 5 Prince of Yugoslavia Peter [1.3.1.1.1]
- 5 Prince of Yugoslavia Alexander [1.3.1.1.2]
- 5 Prince of Yugoslavia Philip [1.3.1.1.3]
- 5 Prince of Yugoslavia Peter [1.3.1.1.1]
- + Katherine Batis
- 4 Crown Prince of Yugoslavia Alexander [1.3.1.1]
- 3 Princess of Greece And Denmark Alexandra [1.3.1]
- 2 Princess of Greece Helen [1.4] b. 02 May 1896 d. 28 Nov 1982
- King of Romania Carol Hohenzollern, II b. 15 Oct 1893 d. 4 Apr 1953
- 3 King of Romania Michael Hohenzollern [1.4.1]
- Princess Anne of Bourbon-Parma
- 4 Princess Margarita of Romania [1.4.1.1]
- 4 Margarita Of Romania [1.4.1.2]
- 4 Princess of Romania Helen [1.4.1.3] b. 15 Nov 1950
- Professor Robin Medforth-Mills b. 8 Dec 1942 d. 2 Feb 2002
- 5 Nicholas Medforth-Mills [1.4.1.3.1]
- 5 Elizabeth Medforth-Mills [1.4.1.3.2]
- 5 Nicholas Medforth-Mills [1.4.1.3.1]
- + Alexander McAtreer
- 4 Irina Of Romania [1.4.1.4]
- 4 Sophie Of Romania [1.4.1.5]
- 4 Maria Of Romania [1.4.1.6]
- 4 Princess Margarita of Romania [1.4.1.1]
- 3 King of Romania Michael Hohenzollern [1.4.1]
- 2 _____ Oldenburg [1.5] b. Abt 1898
- 2 King of Greece Paul Oldenburg, I [1.6] b. 14 Dec 1901 d. 6 Mar 1964
- Princess Frederica Hanover b. 18 Apr 1917 d. 06 Feb 1981
- 3 Sophia of Greece Oldenburg [1.6.1]
- 3 King of Greece Constantine Oldenburg, KIng of Greece II [1.6.2]
- Anne-Marie of Denmark
- 4 _____ Oldenburg [1.6.2.1]
- 4 Alexia Oldenburg [1.6.2.2]
- 4 Duke and Crown Prince Pavlos Oldenburg [1.6.2.3] b. 20 May 1967
- 4 Nicholas Oldenburg [1.6.2.4]
- 4 Theodora Of Greece [1.6.2.5]
- 4 Alexia Of Greece [1.6.2.6]
- 4 Philippos Of Greece [1.6.2.7]
- 4 _____ Oldenburg [1.6.2.1]
- 3 Crown Princess Irene of Greece Oldenburg [1.6.3]
- 3 Sophia of Greece Oldenburg [1.6.1]
- 2 Irene Of Greece [1.7] b. 1904 d. 1974
- 2 Princess of Greece and Denmark Katherine Oldenburg [1.8] b. 4 May 1913 d. 2 Oct 2007
- 2 Catherine Oldenburg [1.1]