"Anna of Hohenstaufen (1230 – April 1307), born Constance, was an Empress of Nicaea. She was a daughter of Frederick II, Holy Roman Emperor and Bianca Lancia." - (en.wikipedia.org 28.10.2019)
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Wife of | John III Doukas Vatatzes ↓ |
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daughter of | Frederick II, Holy Roman Emperor [father of], Bianca Lancia [mother of] ↓ |
sister of | Manfred, King of Sicily ↓↓ |
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