Nielsen Hayden genealogy
Descendants of Trajan, Khan of Western Bulgaria
Father: Iwan Wladislav, Tsar of Western Bulgaria (Abt 975 - Feb 1018 Dyrrhachium, Albania)
Mother: Marija (Abt 975 - Aft 1029)
Trajan, Khan of Western Bulgaria
   └─ Maria of Bulgaria ( - Aft 1081)
    Andronikos Doukas ( - 14 Oct 1077)
       └─ Irene Doukaina (Abt 1066 - 19 Feb 1123)
        Alexios I Komnenos, Emperor of Byzantium (Between 1048 and 1057 - 15 Aug 1118)(m. Abt 1078)
           ├─ Anna Komnene (Constantinople;1 Dec 1083 - 1153)
           ├─ Ioannes II Komnenos Doukas, Emperor of Byzantium (13 Sep 1087 -
           │ 8 Apr 1143 Mount Tarsus, Cilicia, Anatolia) =>
           │ 8 Apr 1143 Mount Tarsus, Cilicia, Anatolia) =>
           │ + Eirene of Hungary (Abt 1078 - 13 Aug 1134)(m. 1104)
           └─ Theodora Comnena (15 Jan 1096 Constantinople - ??) =>
            + Constantius Angelius ( - Aft Jun 1166)(m. Abt 1120)