Nielsen Hayden genealogy
Descendants of Mstislaw Mstislawitsch of Novgorod
Bef 1176 - 1228 (> 52 years)Father: Mstislaw Rostislavitch (Abt 1150 - 13 Jun 1180)
Mother: (Unknown) of Kiev
Mstislaw Mstislawitsch of Novgorod (Bef 1176 - 1228)
   └─ 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)
       │    └─ Boleslaw II of Masovia (Abt 1251 - 20 Apr 1313) =>
       │     + Gaudimanté of Lithuania ( - Between 1288 and 1313)(m. 1279)
       │     + Kunigunde of Bohemia (Jan 1265 - 27 Nov 1321)(m. 1291)
       └─ Leo Danilowitsch, King of Halicz (Abt 1228 - 1301)
        Constance of Hungary (m. Between 1251 and 1252)
           └─ Jurij I Lvovitsch, King of Halicz (24 Apr 1252 - 1308) =>
            + Euphemia of Kujawien ( - 18 Mar 1308)