Nielsen Hayden genealogy
Descendants of Siegfried I of Anhalt
Abt 1230 - Aft 1298 (~ 68 years)Father: Heinrich I von Anhalt (Abt 1170 - Between 1251 and 1252)
Mother: Irmgard von Thüringen (Abt 1197 - Abt 1244)
Siegfried I of Anhalt (Abt 1230 - Aft 25 Mar 1298)
Katarina of Sweden (1245 - ??)(m. Bef 17 Oct 1259)
   └─ Albrecht I of Anhalt ( - Between 17 Aug 1316 and 2 Mar 1317)
    Agnes of Brandenburg ( - 4 Jun 1330 bur.St. Nikolai, Zerbst, Saxony-Anhalt, Germany)(m. 1300)
       └─ Mathilde of Anhalt ( - Abt 1342)
        Bernhard III of Anhalt ( - 20 Aug 1348)(m. Abt 1339)
            + Magnus II of Brunswick (Abt 1328 - 25 Jul 1373 Leveste, Lower Saxony, Germany)(m. Bef 6 Oct 1356)