succeeded Anton I Duke Schleswig-Holstein-Sonderburg-Beck
30 May 1754 married at Königsberg Frederica Charlotte Dohna-Schlodien
12 Sep 1759 died at Szczecin
Mother: Frederica Charlotte Dohna-Schlodien
Friedrich Karl Ludwig Oldenburg Karl I Duke Schleswig-Holstein-Sonderburg-Beck 20 Aug 1757
Father: Peter August Oldenburg August I Duke Schleswig-Holstein-Sonderburg-Beck
Grandfather: Frederick Louis Oldenburg Louis I Duke Schleswig-Holstein-Sonderburg-Beck
1G Grandfather: August Philipp Oldenburg Philip I Duke Schleswig-Holstein-Sonderburg-Beck
2G Grandfather: Alexander Oldenburg I Duke Schleswig-Holstein-Sonderburg-Augustenburg
2G Grandmother: Dorothea Unknown
3G Grandfather: John Günther Unknown 1st Count of Schwarzburg-Sondershausen
1G Grandmother: Marie Sibylle Nassau-Saarbrücken
Grandmother: Louise Charlotte Unknown
1G Grandfather: Ernest Günther Unknown Duke Schleswig-Holstein-Sonderburg-Augustenburg
Mother: Sophie Unknown
Grandfather: Philip Unknown