Christina Sophia of East-Frisia (1600–1658) Parents Enno III, Count of East Frisia Anna of Holstein-Gottorp Children Siblings Rudolf Christian, Count of East Frisia Anna Maria of Ostfriesland Ulrich II, Count of East Frisia Agnes of Ostfriesland Sabina Catherine of East Frisia Partners Philip III, Landgrave of Hesse-Butzbach