de Braose was given lands in south western England, adjacent to Wales, and became one of the most powerful of the Marcher Lords.
William was succeeded as Lord of Bramber by his son, Philip. William was present for the consecration of a church in his hometown of Briouze (whence the name Braose), France, in 1093, so we know he was alive in that year. However, Philip was issuing charters as Lord of Bramber in 1096, indicating that William died sometime between those dates.