Nielsen Hayden genealogy
Descendants of Ida von der Ostmark
Father: Leopold II von Babenberg (Abt 1050 - 12 Oct 1095)
Mother: Ida of Austria ( - Aft 1101)
Ida von der Ostmark
Luitpold ( - 15 Mar 1112)
   └─ Konrad II von Znaim
    Marija of Serbia ( - Aft 1190)(m. 1134)
       └─ Helene von Znaim ( - Between 1202 and 1206)
        Casimir II (1138 - 5 May 1194)(m. Between 1185 and 1186)
           └─ Konrad I of Masovia (Between 1187 and 1188 - 31 Aug 1247) =>
            + Agafia Svjatoslava of Novgorod ( - Aft 31 Aug 1247)(m. 1207)