Tags: Noble.
Anna Maria of Ostfriesland (23 June 1601 – 15 February 1634) was a German noblewoman.She was a daughter of Count Enno III of East Frisia and Anna of Holstein-Gottorp. Her paternal grandmother was Katharina of Sweden a daughter of Gustav I of Sweden and his second wife Margareta Leijonhufvud.On 4 September 1622 she married Adolf Frederick I Duke of Mecklenburg-Schwerin (1588–1658).