Background
He was the fourth son of Siemowit IV, Duke of Masovia and Alexandra of Lithuania, daughter of Algirdas.
He was the fourth son of Siemowit IV, Duke of Masovia and Alexandra of Lithuania, daughter of Algirdas.
On 5 March 1424 along with his brothers Siemowit V, Casimir II and Władysław I, Trojden II attended the wedding and coronation of King Władysław II Jagiełło"s third wife, Sophia of Halshany.
Despite the nominal co-rulership of the brothers, they administered separately their parts of the duchy. An analysis of the documents issued by Trojden II showed that he received Płock. Trojden II died on 25 July 1427, unmarried and without issue.
He was probably buried at Płock Cathedral.