from another county families style directory (which is on Ancestry, by may depend on your sub)
Rev George James Huddleston of Upwell Hall, Cambridgeshire. Born 1802, eldest son of the late George Huddleston Esq, by Mary Elizabeth d of Peter Gauntlet Esq of Winchester. Married 1832 Ann, d of William Lee Esq of Upwell and has issue including George Croft, b 1837.
It also tells me that George was educated at Winchester and Merton College Oxford (BA 1825, MA 1826) and appointed rector of Tunworth nr Basingstoke in 1844. he was magistrate for the Isle of Ely. The Huddleston named was as you say adopted in 1819 on inheritance.
Peter also has an entry - details confirm he and George James are brothers (their father dying in 1834) He was educated at Rugby and called to the bar at Lincoln's Inn in 1831. His son Thomas Jervoise was educated at Eton and "Ch Ch, Oxford" [Christ Church?].
These Huddlestons state they share a common ancestor with the Hudlestons of Hutton John, Cumberland and Sawston Hall, Cambridgeshire. These two branches also have entries in the directory - the Cumberland only have one d in the surname and claim decent from William Hudleston of Millom castle and Jane Seymour, aunt of Queen Jane Seymour. The Sawston branch now spell the surname like Peter and George James and claim to be an ancient Normal family descended from the old Earls of Westmoreland