Schleswig-Holstein-Sonderburg-Beck

Schleswig-Holstein-Sonderburg-Beck (Schleswig-Holstein-Beck for short) was a branch of the Schleswig-Holstein-Sonderburg branch of the House of Oldenburg. It consists of August Philipp, Duke of Schleswig-Holstein-Sonderburg-Beck (1612-1675), and his male-line descendants. Schleswig-Holstein-Glücksburg, to which several present-day royal houses belong, is a branch of Schleswig-Holstein-Beck.

The members of the line were titular dukes of Schleswig and Holstein and were originally not ruling. The line is named after Beck, a manor in Ulenburg, Bishopric of Minden (today Löhne, North Rhine Westphalia). August Philipp bought this manor from the Count of Oldenburg, and made it his residence.

Tree of the Schleswig-Holstein-Sonderburg-Beck line:

• August Philipp, Duke of Schleswig-Holstein-Sonderburg-Beck (1627-75),
  • August, Duke of Schleswig-Holstein-Sonderburg-Beck (1675-89),
    • Frederick William I, Duke of Schleswig-Holstein-Sonderburg-Beck (1689-1719),
  • Frederick Louis, Duke of Schleswig-Holstein-Sonderburg-Beck (1719-28),
    • Frederick William II, Duke of Schleswig-Holstein-Sonderburg-Beck (1728-49),
      • Frederick William III, Duke of Schleswig-Holstein-Sonderburg-Beck (1749-57),
    • Charles Louis, Duke of Schleswig-Holstein-Sonderburg-Beck (1757-74),
    • Peter August, Duke of Schleswig-Holstein-Sonderburg-Beck (1774-75),
      • Karl Anton August, Prince of Schleswig-Holstein-Sonderburg-Beck
        • Friedrich Karl Ludwig, Duke of Schleswig-Holstein-Sonderburg-Beck (1775-1816),
          • Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg (1816-25), founder of the Schleswig-Holstein-Glücksburg line