Siemowit II of Masovia
Member of the Piast dynasty
Siemowit II of Rawa, was a Polish prince member of the House of Piast, Duke of Warsaw and Liw during 1310-1313, after a new division with his brothers since 1313 ruler over Rawa Mazowiecka, Sochaczew, Zakroczym, Gostynin, Ciechanów and Wizna,... Wikipedia
Born: 1283
Died: February 18, 1345 (age 62 years)
Parents: Bolesław II of Masovia and Gaudemunda of Lithuania
Grandparents: Siemowit I of Masovia, Traidenis, and Pereyaslava
Great-grandparents: Konrad I of Masovia, Agafia of Rus, Daniel of Galicia, and more