Nielsen Hayden genealogy
Descendants of Konstancja of Poland
1246 - 1281 (~ 36 years)Father: Przmyslaw I (1220 - 4 May 1257)
Mother: Elisabeth von Schlesien (Between 1224 and 1232 - 16 Jan 1265 Modrze, Poznan, Poland)
Konstancja of Poland (Between 1245 and 1246 - 10 Oct 1281)
Konrad I (Between 1236 and 1245 - Between 15 Mar 1304 and 21 May 1304)(m. 1260)
   └─ Agnes of Brandenburg ( - 4 Jun 1330 bur.St. Nikolai, Zerbst, Saxony-Anhalt, Germany)
    Albrecht I of Anhalt ( - Between 17 Aug 1316 and 2 Mar 1317)(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)