Countess Marie Charlotte of East Frisia (1689-1761) (1689–1761) Parents Christian Everhard, Prince of East Frisia Princess Eberhadine Sophie of Oettingen-Oettingen Children Siblings George Albert, Prince of East Frisia Princess Juliane Luise of East Frisia Princess Christine Sophie of East Frisia Enno August von Ostfriesland Marie Charlotte, Gräfin von Ostfriesland Partners Friedrich Ulrich of Ostfriesland