William I, Duke of Brunswick-Lüneburg

William I, Duke of Brunswick -Wolfenbüttel (* 1270, † September 30, 1292 in Braunschweig) was a son of Albrecht I Duke of Brunswick and Adelaide de Montferrat.

Life

William was born as the third son of Duke Albrecht 's and his second wife Adelheid ( Alessina, † 1285), daughter of the Marquis Boniface of Montferrat. When the father died on August 15, 1279 he left six sons and one daughter ( † 1318 Mechthild ). Three sons Konrad ( † around 1303), Otto ( † around 1346 ) and Lothar ( 1275-1335 ) received a spiritual formation.

Around the year 1286 must be a division of the paternal inheritance have taken place, because his brother Henry the Whimsical ( 1267-1322 ) was known as the Duke of Grubenhagen. Albert the Feiste (1268-1318) therefore received the Principality of Göttingen and Wilhelm large parts of the Brunswick country and its cities. Together, the three brothers fought in 1279 Otto I the then Bishop of Hildesheim and obtained by camping castle. Albrecht and Wilhelm joined forces as a result of a dispute between the brothers against Henry, and in 1288 it came to open hostilities.

William married Elisabeth of Hesse (* 1270, † July 9, 1306 ), a daughter of Count Henry I of Hesse. The marriage remained childless probably. When William died already at a young age in 1292, a dispute erupted for his inheritance, from which ultimately Heinrich after Grubenhagen withdrew, so that the rule in Braunschweig -Wolfenbüttel Albrecht fell to. William was buried in Brunswick Cathedral.