Rudolf Christian, Count of East Frisia Ruler of East Frisia in the early years of the Thirty Years' War (1602–1628) Parents Anna of Holstein-Gottorp Enno III, Count of East Frisia Children Siblings Sabina Catherine of East Frisia Christina Sophia of East-Frisia Agnes of Ostfriesland Anna Maria of Ostfriesland Ulrich II, Count of East Frisia
