Anna Maria of Ostfriesland Duchess consort of Mecklenburg-Schwerin (1601–1634) Parents Anna of Holstein-Gottorp Enno III, Count of East Frisia Children Anna Maria of Mecklenburg-Schwerin Christian Louis I, Duke of Mecklenburg Johann Georg, Herzog von Mecklenburg-Mirow Karl Mecklenburg Siblings Christina Sophia of East-Frisia Agnes of Ostfriesland Rudolf Christian, Count of East Frisia Ulrich II, Count of East Frisia Sabina Catherine of East Frisia Partners Duke Adolf Friedrich I, Duke of Mecklenburg-Schwerin