Nielsen Hayden genealogy
Family: Mieszko I of Silesia / (Unknown wife of Mieszko I of Silesia) (F17320)
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Father | Male
Mieszko I of Silesia
Born Between 1252 and 1256 Died Between 1313 and 1317 Buried Married Father Wladislaw of Oppeln | F17321 Group Sheet Mother Euphemia of Poland | F17321 Group Sheet
Child 1 | Male
+ Casimir I of Silesia
Born Between 1276 and 1280 Died Aft 21 Sep 1358 Buried Cieszyn, Silesia, Poland 
Spouse Euphemia of Masovia | F13381 Married Between 1321 and 1324