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.
Ketika ayahandanya meninggal pada tahun 1313, ia menerima lebih lanjut wilayah Warsawa dan Liw ke dalam wilayah adipatinya, yang menjadikannya memerintah atas seluruh bagian timur Mazovia.