Zwinisława

He was married to Swinisława (d. 1240), maybe a daughter of Polish High Duke Mieszko III the Old, formerly also referred to as a daughter of Duke Ratibor I of Pomerania. They had eight children:[5] 1.Mirosława, married Bogislaw II, Duke of Pomerania at Stettin 2.Swietopelk II, Duke of Pomerania, succeeded his father as Duke of Pomerelia, from 1227 of Pomerelia-Gdańsk 3.Hedwig (Jadwiga), married Duke Władysław Odonic of Greater Poland 4.Witosława, prioress of Żukowo Abbey 5.Warcisław, Duke at Świecie from 1227 6.Sambor II, Duke at Lubiszewo from 1233 7.Ratibor, Duke at Białogard from 1233 8.Milosława, nun at Żukowo Abbey

http://en.wikipedia.org/wiki/Mestwin_I,_Duke_of_Pomerania