What noble family was XXX part of?
Konrad I of Masovia
Konrad I of Masovia (Polish: Konrad I Mazowiecki) (ca. 1187/88 -- 31 August 1247), from the Polish Piast dynasty, was the sixth Duke of Masovia from 1194 until his death as well as High Duke of Poland from 1229 to 1232 and again from 1241 to 1243.
Piast dynasty