Royal Profile: 19 Facts About Gustav, 7th Prince of Sayn-Wittgenstein-Berleburg

1. Gustav Frederik Philip Richard, 7th Prince of Sayn-Wittgenstein-Berleburg was born 12 January 1969 as the only son and eldest child of Princess Benedikte of Denmark & Richard, 6th Prince of Sayn-Wittgenstein-Berleburg {Source}. 
2. He has two sisters:
1. Princess Alexandra of Sayn-Wittenstein-Berleburg (1970)
2. Princess Nathalie of Sayn-Wittenstein-Berleburg (1975)
3. He is also a brother-in-law:
1. Count Jefferson von Pfeil und Klein-Ellgith (1967, m. 1998)
2. Mr. Alexander Johannsmann (1977, m. 2011)
4. He has two nephews:
1. Count Friedrich Richard Oscar Jefferson von Pfeil und Klein-Ellguth(1999)
2. Master Konstantin Gustav Heinrich Richard Johannsmann (2010)
5. His two nieces are:
1. Countess Ingrid Alexandra Irma Astrid Benedikte von Pfeil und Klein-Ellguth (2003)
2. Miss Louisa Johannsmann (2015)
6. He was raised in Germany, alongside his two sisters. 
7. However, in their adult lives, he was the only one to reside there until recently when his sister Alexandra's family moved back to Germany.
8. Princess Alexandra has since moved to France and Princess Nathalie resides in Denmark.
9. At present, he is unmarried and in a long-term relationship with former American model and children's book author-illustrator Carina Axelsson. 
10. If he should remain unmarried and childless at his death, the Sayn-Wittengenstein-Berleburg throne will pass to his uncle Hereditary Prince Robin zu Sayn-Wittgenstein-Berleburg or to his cousin, Prince Sebastian of Sayn-Wittgenstein-Berleburg. 
11. He and his sisters are not in succession for the Danish throne due to their grandfather stipulating that they must be raised in Denmark in order to have succession rights to the Danish crown.
12. However they are in succession distantly for the British throne as descendants of Queen Victoria.
13. He shares a birthday with Archduchess Zsófia Mária Tatjana Monika Erzsébet Katalin von Hasburg (Sophie Maria Tatiana Elisabeth Catherine).
14. His maternal aunts are:
1. Queen Margrethe II of Denmark
2. Queen Anne-Marie of Denmark
15. His maternal uncles are:
1. Prince Henrik of Denmark
2. King Constantine II of Greece
16. His maternal cousins are:
1. Crown Prince Fredrik of Denmark
2. Prince Joachim of Denmark
3. Princess Alexia of Greece and Denmark
4. Crown Prince Pavlos of Greece, Prince of Denmark
5. Prince Nikolaos of Greece and Denmark
6. Princess Theodora of Greece & Denmark
7. Prince Philippos of Greece and Denmark 
17. His maternal cousins-in-law are:
1. Crown Princess Mary of Denmark
2. Princess Marie of Denmark
3. Mr. Carlos Morales Quintana
4. Crown Princess Marie-Chantal of Greece, Princess of Denmark
5. Princess Tatiana of Greece & Denmark
6. Mr. Matthew Kumar *(engaged 2018)
18. His maternal first cousins 1x removed are:
1. Princess Maria-Olympia of Greece and Denmark (1996)
2. Prince Constantine-Alexios of Greece and Denmark (1998)
3. Prince Nikolai of Denmark (1999) 
4. Prince Achileas-Andreas of Greece and Denmark (2000)
5. Prince Felix Henrik Valdemar Christian of Denmark (2002)
6. Miss Arrietta Morales y de Grecia (2002)
7. Miss Ana-Maria Morales y de Grecia (2003)
8. Prince Odysseas Kymon of Greece and Denmark (2004)
9. Master Carlos Morales y de Grecia (2005)
10. Prince Christian of Denmark (2005)
11. Princess Isabella of Denmark (2007)
12. Miss Amelia Morales y de Grecia (2007)
13. Prince Aristidis Stavros of Greece and Denmark (2008)
14. Prince Henrik Carl Joachim Alain of Denmark (2009)
15. Prince Vincent of Denmark (2011)
16. Princess Josephine of Denmark (2011)
17. Princess Athena of Denmark, (2012) 
19. He is the paternal nephew of:
1. Princess Madeleine of Sayn-Wittgenstein-Berleburg (1936)
1. Otto, Count zu Solms-Laubach
2. Prince Robin of Sayn-Wittgenstein-Berleburg (1938) 
1. Birgitta af Klercker m. 1970- 1979, div)
2. Marie-Christine Heftler-Louiche (m.1979)
3. Princess Tatiana of Sayn-Wittgenstein-Berleburg (1940)
1.  Moritz, Landgrave of Hesse  (m. 1964-1974, div)
4. Princess Pia of Sayn-Wittgenstein-Berleburg ( 1942)