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Siemowit IV (Ziemowit IV), also known as Siemowit IV the Younger (pl: Siemowit IV Młodszy; ca. 1353/1356 – 21 January 1426), was a Polish prince member of the House of Piast from the Masovian branch, from 1373/74 Duke of Rawa, and after the division of the paternal inheritance between him and his brother in 1381, ruler over Rawa, Płock, Sochaczew, Gostynin, Płońsk and Wizna, since 1386 ...
Division of Mazovia (1381–1426) Siemowit IV (also known as Ziemowit IV) (ca. 1353/1356 [1] – 21 January 1426 [2]) was one of the Dukes of Mazovia 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 .
Siemowit VI Duke of Płock. Birth 2 Jan 1446 - Unavailable. Death 01 01 1462 - Płock, Mazowieckie, Poland. Mother Anna VON OLESNICA. Father Wladyslaw I Piast dynasty,
Agafia of Rus. Siemowit I of Masovia ( Polish: Siemowit (Ziemowit) I mazowiecki) (d. 23 June 1262), was a Polish prince member of the House of Piast, Duke of Czersk during 1247–1248, Duke of Masovia (except Dobrzyń) during 1248–1262, ruler over Sieradz during 1259–1260. He was the sixth son of Konrad I of Masovia and his wife Agafia of ...
Language Label Description Also known as; English: Siemowit VI of Masovia. POlish noble
Władysław II of Płock (pl: Władysław II płocki; aft. 31 October 1448 - 27 February 1462), was a Polish prince member of the House of Piast from the Masovian branch. He was a Duke of Płock, Rawa Mazowiecka, Belz, Płońsk, Zawkrze and Wizna during 1455-1461/62 (under regency until 1459) jointly with his brother, since 1459 ruler over Gostynin. He was the second son of Władysław I of ...
After the death of Siemowit VI on 31 December 1461/1 January 1462, Władysław II became in the sole ruler of their paternal domains; however, because he was still a minor, the regency was taken again by the Dowager Duchess Anna and Bishop Paweł of Płock. Unfortunately, less than a month later, Władysław II also died.
