Nielsen Hayden genealogy
Descendants of Adelheid von Querfurt
- Aft 1201Father: Burchard II
Mother: Mathilde
Adelheid von Querfurt ( - Aft Apr 1201)
Adolf III of Holstein (Abt 1160 - 3 Jan 1225)(m. Bef May 1189)
   └─ Adolf IV of Holstein (Abt 1192 - 8 Jul 1261)
    Hedwig von der Lippe ( - Abt 1250)(m. Abt 1223)
       ├─ Mechtilde von Holstein (1225 - 1288)
       │ Abel, King of Denmark (1218 - 29 Jun 1252)(m. 25 Apr 1237)
       │    └─ Sophie Abelsdatter of Denmark & S¢nderjylland (Abt 1240 - Aft 1284) =>
       │     + Bernhard I of Anhalt (Abt 1220 - Between 1286 and 1287)
       └─ Gerhard I of Holstein (1232 - 21 Dec 1290)
        Elizabeth von Mecklenburg ( - Bef 6 Feb 1280)(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)
           └─ Heinrich I of Holstein (Between 1255 and 1260 -
            5 Aug 1304 bur.Itzehoe, Schleswig-Holstein, Germany) =>
            5 Aug 1304 bur.Itzehoe, Schleswig-Holstein, Germany) =>
            + Heilwig von Bronkhorst ( - Bef 1331)(m. 1289)