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Trojden I (1284/86 – 13 March 1341), was a Polish prince member of the House of Piast, Duke of Czersk since 1310, ruler over Warsaw and Liw since 1313, regent of Płock during 1336–1340. He was the second son of Bolesław II of Płock and his first wife Gaudemantė (Sophia) , the daughter of Grand Duke Traidenis of Lithuania.
Trojden I (1284/86 – 13 March 1341), was a Polish prince member of the House of Piast, Duke of Czersk since 1310, ruler over Warsaw and Liw since 1313, regent of Płock during 1336–1340. He was the second son of Bolesław II of Płock and his first wife Gaudemantė (Sophia) , the daughter of Grand Duke Traidenis
Bolesław II of Masovia or Bolesław II of Płock (pl: Bolesław II mazowiecki (płocki); ca. 1253/58 – 20 April 1313), was a Polish prince, member of the House of Piast, Duke of Masovia during 1262-1275 jointly with his brother, after 1275 sole ruler over Płock, after 1294 ruler over all Masovia and Duke of Kraków and Sandomierz during 1288-1289.
Trojden I (1284/86 – 13 March 1341), was a Polish prince, member of the House of Piast, Duke of Czersk after 1310, ruler over Warsaw and Liw after 1313, regent of Płock during 1336–1340. He was the second son of Bolesław II of Płock and his first wife Gaudemantė (Sophia), the daughter of Grand Duke Traidenis of Lithuania. He was named after his maternal grandfather.
Life. In 1310, when his father was still alive Trojden I received the district of region Czersk. When his father died in 1313, he further received the districts of Warsaw and Liw in addition to his duchy, which made him ruler over all the eastern Masovia. This division didn't satisfy anybody and lead to a brief war between the three brothers in ...
When Duchess Euphemia of Czersk-Warsaw was born in 1310, in Sochaczew, Sochaczew, Masovia, Poland, her father, Trojden I Piast Duke of Czersk, was 26 and her mother, Maria Rurykowicz Princess of Galicia, was 17. She married Duke Casimir I of Cieszyn before about 19 August 1324. They were the parents of at least 5 sons and 4 daughters.
