Nielsen Hayden genealogy
Descendants of Mstislaw Rostislavitch
Abt 1150 - 1180 (~ 30 years)Father: Rostislav I (Abt 1110 - 14 Mar 1168)
Mstislaw Rostislavitch (Abt 1150 - 13 Jun 1180)
   └─ Mstislaw Mstislawitsch of Novgorod (Bef 1176 - 1228)
    (Unknown) of the Cumans
       └─ Anna Mstislawna of Novgorod ( - Bef 1252)
        Daniil Romanovich, King of Ruthenia (Between 1201 and 1202 - 1264)
           ├─ Pereslajawa Danilovna of Halicz ( - 12 Apr 1283) =>
           │ + Siemowit I of Masovia (Abt 1228 - 23 Jun 1262)(m. Abt 1248)
           └─ Leo Danilowitsch, King of Halicz (Abt 1228 - 1301) =>
            + Constance of Hungary (m. Between 1251 and 1252)