Nielsen Hayden genealogy
Family: Guillaume Pierre I de Lascaris de Vintimille / Eudokia Laskarina (F21737)
m. Abt 1263
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Male
Guillaume Pierre I de Lascaris de Vintimille
Birth Death Burial Marriage Abt 1263 [1, 2] Father Guillaume III de Vintimille | F21738 Group Sheet Mother
Female
Eudokia Laskarina
Birth Abt 1248 Nicaea, Asia Minor 
Death 1311 Zaragoza, Aragón, Spain 
Burial Father Theodoros II Doukas Laskaris, Emperor of Nicaea | F21745 Group Sheet Mother Elena of Bulgaria & Vlachia | F21745 Group Sheet
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Sources - [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler., says "1261".
- [S38] Genealogy of the French in North America, by Denis Beauregard. Complete version, 2025.
- [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler., says "1261".