Wie trouwde met Anna Kostewicz?

Jan Radziwiłł (1492 – January 1542) was the Deputy Cup-Bearer of Lithuania and the Elder of Samogitia since 1535 until death. He was a grandson of Mikalojus Radvila the Old and the only son of Mikołaj II Radziwiłł. He had no male heirs therefore he was the last from the Goniądz-Meteliai Radziwiłł family line.