Siemowit II of Masovia
Polish duke · Lived 1283 to 1345 · aged 62
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, regent of Płock during 1336-1340.
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Lived 1283 to 1345 · aged 62