Siemowit IV Duke of Masovia

Tags: Noble.

Siemowit IV (also known as Ziemowit IV) (ca. 1353/1356 – 21 January 1426) was one of the Dukes of Masovia of the old Polish Piast royal family. His domain included the lands of Czersk Rawa Sochaczew Płock and Gostynin. In 1381 he inherited Wisz and in 1387 Bełz.

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birth date: 1352-01-01T00:00:00+02:00
death date: 1426-01-21
parent: Siemowit III Duke of Masovia
spouse: Alexandra of Lithuania
title: Duke of Masovia

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