Background
Mestwin was a member of the Samborides dynasty, the son of Duke Sobiesław of Gdańsk and younger brother of Sambor I, whom he succeeded in Pomerelia by appointment of the Polish High Duke Władysław III Spindleshanks.
Mestwin was a member of the Samborides dynasty, the son of Duke Sobiesław of Gdańsk and younger brother of Sambor I, whom he succeeded in Pomerelia by appointment of the Polish High Duke Władysław III Spindleshanks.
In the tables of Oliwa Abbey, he is recorded as pacificus ("the Peaceful"). After King Valdemar II of Denmark had conquered the southern coast of the Baltic Sea with Gdanzk during a crusade against the Old Prussians, Duke Mestwin in 1210 had to accept Danish overlordship, but was able to free himself again the next year. They had eight children: Mirosława, married Bogislaw II, Duke of Pomerania at Stettin Swietopelk II, Duke of Pomerania, succeeded his father as Duke of Pomerelia, from 1227 of Pomerelia-Gdańsk Hedwig (Jadwiga), married Duke Władysław Odonic of Greater Poland Witosława, prioress of Żukowo Abbey Warcisław, Duke at Świecie from 1227 Sambor II, Duke at Lubiszewo from 1233 Ratibor, Duke at Białogard from 1233 Milosława, nun at Żukowo Abbey.