Nielsen Hayden genealogy
Family: Siemowit I of Masovia / Pereslajawa Danilovna of Halicz (F17326)
m. Abt 1248
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Konrad I of Masovia (1187-1247)
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Agafia Svjatoslava of Novgorod ( -1247)
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Casimir I of Kujawien (1211-1267)  |
| Daniil Romanovich, King of Ruthenia (1201-1264)
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| Anna Mstislawna of Novgorod ( -1251)
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| Leo Danilowitsch, King of Halicz (1228-1301) |
| Siemowit I of Masovia (1228-1262)
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| Pereslajawa Danilovna of Halicz ( -1283)
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| Boleslaw II of Masovia (1251-1313) |