Friedrich Karl Ludwig, Duke of Schleswig-Holstein-Sonderburg-Beck was the ninth and penultimate Duke of Schleswig-Holstein-Sonderburg-Beck. Friedrich Karl Ludwig was the son of Prince Karl Anton August of Schleswig-Holstein-Sonderburg-Beck and Countess Charlotte of Dohna-Schlodien.
- Occupation
- aristocrat, writer, lieutenant general
- Citizenship
- Kingdom of Prussia
- Born
- August 20, 1757
- Died
- March 25, 1816
