Nielsen Hayden genealogy
Ancestors of Johann I von Mecklenburg
Abt 1211 - 1264 (~ 53 years) ┌── Niklot, Prince of the Obotrites (Abt 1100 - Aug 1160)
┌── Przybyslaw, Prince of the Obotrites (Abt 1120 - 30 Dec 1178 Lüneburg, Lower Saxony, Germany)
┌── Heinrich Burwin I (Bef 1150 - 28 Jan 1227)(m. 1166)
│ │ ┌── Wartislaw I (Abt 1100 - Between 1140 and 1148)
│ └── Wojslawa ( - 1172)
│
Johann I von Mecklenburg (Abt 1211 - 1 Aug 1264)
│
│ ┌── Welf I of Bavaria ( - 6 Nov 1101 Paphos, Cyprus)(m. 1071) =>
│ ┌── Henry IX of Bavaria (1074 - 13 Dec 1126 Ravensburg, Upper Swabia, Germany)(m. Abt 1100)
│ │ └── Judith of Flanders (Abt 1033 -
│ │ 5 Mar 1094 Weingarten Abbey, Ravensburg, Upper Swabia, Germany)(m. 1071) =>
│ │ 5 Mar 1094 Weingarten Abbey, Ravensburg, Upper Swabia, Germany)(m. 1071) =>
│ │
│ ┌── Heinrich of Saxony (Abt 1100 - 20 Oct 1139)(m. 29 May 1127)
│ │ │
│ │ │ ┌── Magnus of Saxony (Abt 1045 - 23 Aug 1106 bur.Artlenburg, Lower Saxony)
│ │ │ │ (m. Between 1070 and 1071) =>
│ │ └── Wulfhilde of Saxony (Abt 1075 -
│ │ 29 Dec 1126 Weingarten Abbey, Ravensburg, Upper Swabia, Germany)(m. Abt 1100)
│ │ 29 Dec 1126 Weingarten Abbey, Ravensburg, Upper Swabia, Germany)(m. Abt 1100)
│ │ └── Sophia of Hungary (Abt 1050 - 18 Jun 1095)(m. Between 1070 and 1071) =>
│ │
│ ┌── Heinrich of Saxony (1129 - 6 Aug 1195 Braunschweig, Lower Saxony, Germany)
│ │ │
│ │ │ ┌── Lothar II von Süpplinburg, Holy Roman Emperor (Bef 9 Jun 1075 - 4 Dec 1137)(m. 1100)
│ │ │ │ └── Hedwig of Formbach ( - Between 1085 and 1090) =>
│ │ │ │
│ │ └── Gertrud von Süpplinburg (18 Apr 1115 - Abt 18 Apr 1143)(m. 29 May 1127)
│ │ │
│ │ │ ┌── Heinrich von Northeim (Abt 1051 - Bef 10 Apr 1101) =>
│ │ └── Richenza von Northeim ( - 10 Jun 1141)(m. 1100)
│ │ └── Gertrude von Meissen (Abt 1060 - 9 Dec 1117) =>
│ │
└── Mechtild of Saxony (Abt 1150 - Bef 1219)(m. 1166)
│
│ ┌── Folmar of Metz ( - 1087) =>
│ ┌── Gottfried of Bliesgau ( - Aft 1075)
│ │ └── Judith
│ │
│ ┌── Gottfried I ( - Aft 1135)
│ │ │
│ │ │ ┌── Conrad I of Luxembourg (Abt 1040 - 8 Aug 1086)(m. Abt 1073) =>
│ │ └── Mathilde von Luxembourg
│ │ └── Clementia of Aquitaine ( - 4 Jan 1142)(m. Abt 1073) =>
│ │