Trojden II of Płock

Trojden II of Płock (1403/06[1] - 25 July 1427[2]), was a Polish prince member of the House of Piast from the Masovian branch.

He was a Duke of Płock, Rawa Mazowiecka, Gostynin, Sochaczew and Belz during 1426-1427 jointly with his brothers.

He was the fourth son of Siemowit IV, Duke of Masovia and Alexandra of Lithuania, daughter of Algirdas.

After the death of their father on 21 January 1426 Trojden II and his brothers, not wanting to further weaken their positions and domains with subsequent divisions, decided to co-rule all their paternal inheritance.

Another factor could be the difficult relationship with their mother, and after an eventual division of their domains they were forced to give her part of the lands as her dower.