When Duke Ratibor "Białogardzki" Sobiesławowic was born about 1212, in Gdańsk, Pomerania, Poland, his father, Mestwin of Pomerelia I, Prince Duke of Gdansk, was 54 and his mother, Princess Zwinislawa Von Polen, was 52. He died on 6 June 1272, at the age of 61.
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