Brightiffe was born at Baconsthorpe, Norfolk, the son of Edmund Brightiffe,
gentleman, and his wife Mary Longe, daughter of Robert Longe of Spixworth, Norfolk. Brightiffe was educated at Baconsthorpe, at
Holt School and in Norwich. He subsequently entered the
Middle Temple on 29 May 1682, and was called to the
Bar in 1688. Brightiffe married Judith Edgar, daughter of Henry Edgar of Eye, Suffolk; she died in 1705. In 1704 Brightiffe was appointed Recorder of Lynn and held the post until 1730. He married as his second wife Elizabeth Rant, daughter of Sir William Rant of Thorpe Market, Norfolk; she died in 1712. As a Norwich lawyer, he acted as legal adviser to the Townshend and Walpole families. ==Political career==