Siemowit IV

Born:

1353/1356

Died:

06.01.1426

Place of death:

Gostynin

Place of burial:

Cathedral of the Assumption of the Blessed Virgin Mary in Płock

Titles

• Duke of Masovia
• Duke of Płock
• Duke of Rawa
• Duke of Belz

Relations

• father: Siemowit III
• mother: Eufemia of Opawa
• concubinage: N.N. (concubine of Siemowit IV, mother of Mikłusz)
• son: Miklusz
• wife: Alexandra of Lithuania
• son: Siemowit V
• daughter: Hedwig of Masovia
• daughter: Cymburgis of Masovia
• son: Alexander of Masovia
• daughter: Euphemia
• daughter: Amelia of Masovia
• son: Casimir II of Belz
• son: Trojden II
• son: Władysław I of Płock
• daughter: Aleksandra Siemowitówna
• daughter: Anna
• daughter: Maria of Masovia
• daughter: Catherine of Masovia

Bibliography

• Janusz Grabowski, Dynastia Piastów mazowieckich, Avalon, Kraków 2012