William of Winchester

William of Winchester (1184–1213) was the youngest son of Duke Henry the Lion of Saxony and Matilda of England, born in Winchester during his father's exile. He probably grew up at his uncle King Richard I's court, and in 1194 he and his brother Otto were surrendered as hostages to secure Richard's ransom.

At the 1202 partition of the Welf lands he received Lüneburg and made it his residence, fostering its salt trade. Earlier that year he married Helena, sister of Canute VI of Denmark. Their only son, Otto the Child, became the first Duke of Brunswick-Lüneburg in 1235.