Nielsen Hayden genealogy
Descendants of Casimir I of Kujawien
Abt 1211 - 1267 (~ 56 years)Father: Konrad I of Masovia (Between 1187 and 1188 - 31 Aug 1247)
Mother: Agafia Svjatoslava of Novgorod ( - Aft 31 Aug 1247)
Casimir I of Kujawien (Abt 1211 - 14 Nov 1267)
Euphrosyne of Oppeln (Between 1228 and 1230 - 4 Nov 1292)(m. 1257)
   └─ Euphemia of Kujawien ( - 18 Mar 1308)
    Jurij I Lvovitsch, King of Halicz (24 Apr 1252 - 1308)
       └─ Marija Jurjewma of Halicz (Bef 1293 - 11 Jan 1341)
        Trojden I of Masovia (Between 1284 and 1286 - 13 Mar 1341)(m. Bef 1310)
           └─ Euphemia of Masovia (Abt 1310 - Aft 1373 bur.Cieszyn, Silesia, Poland) =>
            + Casimir I of Silesia (Between 1276 and 1280 - Aft 21 Sep 1358 bur.Cieszyn, Silesia, Poland)
            (m. Between 1321 and 1324)
            (m. Between 1321 and 1324)