Trojden I Piast of Masovia, Duke of Masovia, Duke of Czersk, was born circa 1285 to Boleslaus II of Masovia (c1251-1313) and Sophia of Lithuania and died 13 March 1341 of unspecified causes. He married Maria Yuryevna of Halych (c1292-1341) 1310 JL . Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Rollo of Normandy (860-932)/s.
|Offspring of Trojden I of Masovia and Maria Yuryevna of Halych (c1292-1341)|
|Euphemia of Masovia (1310-c1374)||1310||1373||Casimir I of Cieszyn (c1285-1358)|
|Boleslaw-Yuri II of Halych (1308-1340)||1308||7 April 1341||Eufemija of Lithuania (1316-1342)|
|Siemowit III of Masovia (c1320-1381)||1320||16 June 1381||Euphemia of Troppau (c1320-1352) Euphemia of Troppau (c1320-1352) Anna of Ziębice|
|Casimir of Warsaw (c1325-1355)||1325||25 November 1355|