Bolesław was born before 1421, the son of Bolesław III von Massow and Anna Ivanovna Holczanska. The place is not known.
He died on 10 SEP 1454. The place is not known.
His wife is not known, but they were married in BEF 1466. The place has not been found. Their ten known children were Anna (<1450-<1480), Bolesław (?-c1453), Janusz (?-c1454), Bolesław (?-c1454), Janusz (?-c1455), Konrad III (<1450-1503), Kazimierz III (1448/49-1480), Bolesław V (?-1488), Janusz II (?-1495) and Zofia (<1453->1454).
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Bolesław IV von Massow |
Bolesław III von Massow |
Janusz I von Massow |
Ziemowit III von Massow |
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Eufemie Opavská |
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Danuta Anna of Lithuania |
Kęstutis |
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Birutė |
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Anna Ivanovna Holczanska |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Birth | BEF 1421 |
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| Death | 10 SEP 1454 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | prince of Warszawa and Plock |