Gustav, Hereditary Prince of Sayn-Wittgenstein-Berleburg [SEP] mother
Gustav, 7th Prince of Sayn-Wittgenstein-Berleburg
Gustav, 7th Prince of Sayn-Wittgenstein-Berleburg (Gustav Frederik Philip Richard; born 12 January 1969), is the eldest child and only son of Princess Benedikte of Denmark and Richard, 6th Prince of Sayn-Wittgenstein-Berleburg.
Biography.
Prince Gustav is the head of the House of Sayn-Wittgenstein-Berleburg, the senior branch of the formerly princely house of Sayn. 
He resides at "Schloss Berleburg-Wittgenstein" in the town
(born 2003)
- Prince Odysseas-Kimon of Greece and Denmark (born 2004)
- Amelia Morales y de Grecia (born 2007)
Princess Nathalie of Sayn-Wittgenstein-Berleburg.
- Countess Ingrid Alexandra Irma Astrid Benedikte von Pfeil und Klein-Ellguth (born 2003)
Queen Anne-Marie of Greece.
- Prince Frederik André Henrik Christian of Denmark, later Crown Prince Frederik (born 1968)
- Prince Gustav Frederik Philip Richard of Sayn-Wittgenstein-Berleburg, later Hereditary Prince