Nielsen Hayden genealogy
Descendants of Elizabeth von Mecklenburg
- Bef 1280Father: Johann I von Mecklenburg (Abt 1211 - 1 Aug 1264)
Mother: Luitgard von Henneberg ( - Bef 14 Jun 1267)
Elizabeth von Mecklenburg ( - Bef 6 Feb 1280)
Gerhard I of Holstein (1232 - 21 Dec 1290)(m. Abt 1250)
   ├─ Gerhard II of Holstein (Bef 1 Nov 1253 - 25 Oct 1312 bur.Hamburg Cathedral, Hamburg, Germany)
   │ Ingeborg of Sweden ( - Bef 1293)(m. 12 Dec 1275 Lödöse, Sweden)
   │    └─ Gerard IV of Holstein ( - 1317)
   │     Anastasia of Schwerin-Wittenburg ( - Aft 7 Jun 1314)(m. Between 30 Jul 1313 and 21 Oct 1313)
   │        └─ Ingeborg of Holstein (Between 1314 and 1317 - Aft 1342) =>
   │         + Konrad I of Oldenburg ( - Bef 9 Feb 1348)(m. Bef 13 May 1339)
   └─ Heinrich I of Holstein (Between 1255 and 1260 - 5 Aug 1304 bur.Itzehoe, Schleswig-Holstein, Germany)
    Heilwig von Bronkhorst ( - Bef 1331)(m. 1289)
       └─ Gerhard III of Holstein (Abt 1293 - 1 Apr 1340 Sankt Mortens, Randers, Denmark)
        Sophia of Werle ( - Aft 6 Dec 1339)(m. Abt 1314)
           └─ Heinrich II of Holstein (Between 1316 and 1318 - Bef 17 Apr 1390) =>
            + Ingeburg of Mecklenburg ( - Aft 25 Jul 1395)(m. Abt 1366)