Sir William Prouz (died 1316[1]) was a noble landowner in Devon, and likely builder of Gidleigh Castle.
[2] His parents were William Prouz, Sheriff of Devon, and Lady Alice de Ferrers.
[6] William is believed to have added the south chapel to the Church of St John the Baptist, near to the manor house in Lustleigh.
[7] At his death, William's will stated that he should be buried with his ancestors at the church in Lustleigh, but his executors interred his body at Holbeton[a] instead.
His daughter, Alice Prouz, had to petition the bishop to exhume William's body and have it reinterred at Lustleigh, for which a mandate was issued.