Janusz I the Old

Born:

ca. 1346

Died:

08.12.1429

Place of death:

Czersk

Place of burial:

Collegiate Church of St. John the Baptist in Warsaw

Titles

• Duke of Masovia
• Duke of Warsaw

Relations

• father: Siemowit III
• mother: Eufemia of Opawa
• wife: Danuta Anna
• daughter: N.N. (Olga? - daughter of Janusz I the Old, wife of Piotr I Muszatowicz, then Wilcza)
• son: Janusz the Younger
• son: Bolesław Januszowic
• son: Konrad Januszowic

Bibliography

• Janusz Grabowski, Poczet książąt i księżnych mazowieckich, Avalon, Kraków 2019