Johann Casimir
Johann Kasimir or Johann Casimir is the name of the following people:
- Johann Casimir (Saxe-Coburg) (1564–1633), Duke of Saxe-Coburg
- Johann Casimir (Nassau-Weilburg) (1577–1602), founder of the Nassau-Gleiberg line
- Johann Kasimir (Pfalz-Simmern) (1543–1592), Count Palatinate of Pfalz-Simmern and administrator of the Electoral Palatinate
- Johann Kasimir (Pfalz-Zweibrücken-Kleeburg) (1589–1652), Count Palatine of Pfalz-Zweibrücken-Kleeburg
- Johann Kasimir (Anhalt-Dessau) (1596–1660), Prince of Anhalt-Dessau
- John II Casimir (1609–1672), King of Poland
