Wilhelm Longsword of Winchester Welf von Braunschweig-Lüneburg was born 11 April 1184 in Winchester to Heinrich der Löwe (c1130-1195) and Matilda of England (1156-1189) and died 13 December 1213 of unspecified causes. He married Helen of Denmark (c1174-1233) 1202 JL . William I of England (1027-1087), Henry II of England (1133-1189), Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Hugh Capet (c940-996)/s, Rollo of Normandy (860-932)/s.
|Offspring of Wilhelm von Braunschweig-Lüneburg and Helen of Denmark (c1174-1233)|
|Otto von Braunschweig-Lüneburg (c1204-1252)||1204||9 June 1252 Lüneburg, Lower Saxony, Germany||Mechthild von Brandenburg (c1210-1261)|