Nielsen Hayden genealogy
Family: Casimir I of Silesia / Euphemia of Masovia (F13381)
m. Between 1321 and 1324Mieszko I of Silesia (1252-1313) 
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| Trojden I of Masovia (1284-1341)
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Marija Jurjewma of Halicz (1292-1341)
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| Casimir I of Silesia (1276-1358)
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| Euphemia of Masovia (1310-1374)
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Anna of Silesia (1325-1367)  |