Overview
Agnes of the Palatinate (1201–1267) was a daughter of Henry V, Count Palatine of the Rhine and his first wife Agnes of Hohenstaufen, daughter of Conrad, Count Palatine of the Rhine. Agnes was Duchess of Bavaria by her marriage to Otto II Wittelsbach, Duke of Bavaria.
Family
Agnes was the youngest of three children born to her father by both of his marriages. Her father's second wife, also called Agnes, was the daughter of Conrad II, Margrave of Lusatia. Agnes' older sister was Irmgard, wife of Herman V, Margrave of Baden-Baden and her brother was Henry VI, Count Palatine of the Rhine.
Marriage
Agnes married Otto II at Worms when he came of age in 1222. With this marriage, the Wittelsbach family inherited Palatinate and kept it as a Wittelsbach possession until 1918. Since that time also the lion has become a heraldic symbol in the coat-of-arms for Bavaria and the Palatinate.
In 1231 upon the death of Otto's father, Louis I, Duke of Bavaria, Otto and Agnes became Duke and Duchess of Bavaria.
From Wikipedia (CC BY-SA 4.0).