Countess Palatine Maria Eufrosyne of Zweibrücken, Swedish princess (d. 1687)
Maria Euphrosyne of Zweibrücken (14 February 1625 – 24 October 1687) was a countess palatine, a cousin and foster-sibling of Queen Christina of Sweden, and a sister of King Charles X of Sweden. She was also, after the accession of her brother Charles X on the throne (1654), a titular Royal Princess of Sweden.