Category:Boleslaus I, Duke of Masovia

**Bolesław I of Masovia**
	Polish noble
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Date of birth	c. 1208
Date of death	1248 (after 1248), 1248
Occupation	monarch; feudatory;
Position held	Duke of Masovia;
Noble title	Duke of Masovia;
Family	Piast dynasty;
Father	Konrad I of Masovia;
Mother	Agafia of Rus;
Sibling	Casimir I of Kuyavia; Siemowit I of Masovia; Judith of Masovia;
Child	Siemowit I of Masovia;
Spouse	Gertrud of Wroclaw; Anastasia of Bielsko;
Authority file
	Q2678613; VIAF ID: 315103344; GND ID: 1068588977
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