Nielsen Hayden genealogy
Descendants of Maria of Hungary
- 1237Father: András II, King of Hungary (1176 - 21 Sep 1235)
Mother: Gertrud von Meran (Abt 1185 - 28 Sep 1213)
Maria of Hungary ( - 1237)
Iwan Asen II, Tsar of Bulgaria (Abt 1190 - Jun 1241)(m. Jan 1221)
   └─ Elena of Bulgaria & Vlachia (1224 - Bef 1254)
    Theodoros II Doukas Laskaris, Emperor of Nicaea (1222 - Aug 1258)(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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