Nielsen Hayden genealogy
Descendants of Ioannes III Doukas, Emperor of Nicaea
Abt 1192 - 1254 (~ 62 years)Father: Basileios Batatzes ( - Abt 1193)
Mother: (Unknown) Angelina
Ioannes III Doukas, Emperor of Nicaea (Abt 1192 - 3 Nov 1254 Nymphaion, now Kemelpasa, Izmir, Turkey)
Eirene Doukaina Komnene Laskarina (Abt 1200 - 1239)(m. 1212)
   └─ Theodoros II Doukas Laskaris, Emperor of Nicaea (1222 - Aug 1258)
    Elena of Bulgaria & Vlachia (1224 - Bef 1254)(m. 1235)
       └─ Eudokia Laskarina (Abt 1248 Nicaea, Asia Minor - 1311 Zaragoza, Aragón, Spain)
        Guillaume Pierre I de Lascaris de Vintimille (m. Abt 1263)
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