Fredericka is a given name and may refer to:
The House of Wettin is a dynasty of German kings, prince-electors, dukes, and counts that once ruled territories in the present-day German states of Saxony, Saxony-Anhalt and Thuringia. The dynasty is one of the oldest in Europe, and its origins can be traced back to the town of Wettin, Saxony-Anhalt. The Wettins gradually rose to power within the Holy Roman Empire. Members of the family became the rulers of several medieval states, starting with the Saxon Eastern March in 1030. Other states they gained were Meissen in 1089, Thuringia in 1263, and Saxony in 1423. These areas cover large parts of Central Germany as a cultural area of Germany.
Alexander, Prince of Saxe-Gessaphe, is the adopted son and heir of Maria Emanuel, Margrave of Meissen, and a businessman with Lebanese, Mexican, Polish and German roots. Following the death of Maria Emanuel in July 2012 he assumed the headship of the Royal House of Saxony, based on a 1997 agreement that named him heir, but which was repudiated a few years later by a number of signatories. His claim is disputed by his cousin Prince Daniel of Saxony.
Johann Georg, Duke of Saxe-Weissenfels, was a duke of Saxe-Weissenfels-Querfurt and a member of the House of Wettin.
Johann Adolf II, Duke of Saxe-Weissenfels, was the last duke of Saxe-Weissenfels-Querfurt and a member of the House of Wettin. He was also a commander in the Saxon army.
Heinrich, Duke of Saxe-Merseburg, was a duke of Saxe-Merseburg and member of the House of Wettin.
Frederick Heinrich of Saxe-Zeitz-Pegau-Neustadt, was a German prince of the House of Wettin.
Johanna Magdalene of Saxe-Weissenfels, was a Duchess consort of Courland and by marriage member of the House of Kettler. By birth she was member of the Saxe-Weissenfels line of the House of Wettin.
Henriette Charlotte of Nassau-Idstein, was a German noblewoman member of the House of Nassau and by marriage Duchess of Saxe-Merseburg.
Magdalene Sibylle of Saxe-Weissenfels, was a German noblewoman member of the House of Wettin and by marriage Duchess of Saxe-Eisenach.
Sophie Hedwig of Saxe-Merseburg, was a German noblewoman member of the House of Wettin and by marriage Duchess of Saxe-Saalfeld.
Christiane of Saxe-Merseburg, was a German noblewoman member of the House of Wettin and by marriage Duchess of Saxe-Gotha-Altenburg.
Sophie Charlotte of Württemberg, was a German noblewoman of the House of Württemberg and by marriage Duchess of Saxe-Eisenach.
Anna Sophie Charlotte of Brandenburg-Schwedt, was a German noblewoman and member of the House of Hohenzollern and by marriage Duchess of Saxe-Eisenach.
Anna Fredericka Philippine of Schleswig-Holstein-Sonderburg-Wiesenburg, was a German noblewoman member of the House of Oldenburg and by marriage Duchess of Saxe-Zeitz-Pegau-Neustadt.
Sophie Elisabeth of Schleswig-Holstein-Sonderburg-Wiesenburg, was a German noblewoman member of the House of Oldenburg and by marriage Duchess of Saxe-Zeitz.
Elisabeth of Mecklenburg-Güstrow, was a German noblewoman member of the House of Mecklenburg and by marriage Duchess of Saxe-Merseburg-Spremberg and Saxe-Merseburg.
Eleonore Sophie of Saxe-Weimar, was a German noblewoman member of the House of Wettin and by marriage Duchess of Saxe-Merseburg-Lauchstädt.
Fredericka Elisabeth of Saxe-Eisenach, was a German noblewoman member of the House of Wettin and by marriage Duchess of Saxe-Weissenfels.
Fredericka of Saxe-Gotha-Altenburg, was a German noblewoman member of the House of Wettin and by marriage Duchess of Saxe-Weissenfels.
Sibylle is a given name. It may refer to: