Constance-Anna of Hohenstaufen (fl. 13th century)

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Constance-Anna of Hohenstaufen (fl. 13th century)

Byzantine empress. Name variations: Anna-Constance of Hohenstauffen; Anna Constanza. Dau. of Frederick II, Holy Roman emperor (r. 1215–1250) and Constance of Aragon (d. 1222); 2nd wife of John III Dukas Vatatzes, Nicaean [Byzantine] emperor (r. 1222–1254); children: Basil Vatatzes. John III's 1st wife was Irene Lascaris (fl. 1222–1235).