Nielsen Hayden genealogy
Ancestors of Heinrich I of Brandenburg
Abt 1260 - 1318 (~ 58 years) ┌── Otto I of Brandenburg (Abt 21 Jun 1126 - 7 Mar 1184) =>
┌── Albrecht II of Brandenburg (Abt 1177 - 25 Feb 1220)(m. Aug 1205)
│ └── Adelheid
│
┌── Johann I of Brandenburg (1213 - 4 Apr 1266)(m. 7 May 1255)
│ │
│ │ ┌── Konrad von Nieder-Lausitz (Abt 1156 - 6 May 1210)(m. Aft 29 Jan 1180) =>
│ └── Mathilde von Nieder-Lausitz ( - 1255)(m. Aug 1205)
│ └── Elisabeth of Poland ( - 2 Apr 1209)(m. Aft 29 Jan 1180) =>
│
Heinrich I of Brandenburg (Abt 1260 - 14 Feb 1318 bur.Chorin Cloister, Chorin, Brandenburg, Germany)
│
│ ┌── Bernhard III of Saxony (1140 - 9 Feb 1212) =>
│ ┌── Albrecht I of Saxony (Abt 1180 - 8 Nov 1261)
│ │ └── Judith of Poland (Abt 1152 - Aft 1201) =>
│ │
└── Jutta of Saxony ( - 23 Dec 1287)(m. 7 May 1255)
│
│ ┌── Hermann I of Thuringia (Abt 1154 - 25 Apr 1217) =>
└── Agnes von Thüringen (Abt 1206 - Bef 1247)
└── Sophie of Bavaria (Abt 1172 - 15 Jul 1238) =>