Siemowit III, Duke of Masovia

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Name	Siemowit III, Duke of Masovia
Gender	Male
Birth	1320
Death	June 16 1381
Religion	Catholicism

Relatives

Relation	Name	Birth
Father	Trojden I, Duke of Masovia
Mother	Maria of Galicia
Son	Siemowit IV, Duke of Masovia	1352
Daughter	Margaret of Masovia
Son	Janusz I of Warsaw	1340

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