People Poland Siemowit III, Duke of Masovia peoplepill id: siemowit-iii-duke-of-masoviaSIDOM 1 views today 1 views this weekPolish noblemanSiemowit III, Duke of MasoviaBiographyListsAlso ViewedListsSiemowit III, Duke of Masovia is in following listsBy field of workNotable Polish royalsGender:MaleBy work and/or countryNotable Polish NoblesGender:MaleFrom our partnersSponsoredSiemowit III, Duke of Masovia
