Nielsen Hayden genealogy
Family: Casimir I of Kujawien / Euphrosyne of Oppeln (F17343)
m. 1257
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Konrad I of Masovia (1187-1247)
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Agafia Svjatoslava of Novgorod ( -1247)
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Siemowit I of Masovia (1228-1262)  |
| Kasimir I of Oppeln (1176-1230)
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| Viola ( -1251) |
| Wladislaw of Oppeln (1225-1281) |
| Casimir I of Kujawien (1211-1267)
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| Euphrosyne of Oppeln (1228-1292)
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| Euphemia of Kujawien ( -1308) |