You have a clue in the Census in that Eliza's brother Ephraim LEADBETTER/LEADBEATER is lodging with them.
Eliza LEADBETTER was baptised at Littledean Parish Church on 17 January 1821. Her parents: James LEADBETTER and Jemima MORGAN who married 25 October 1810.

William MORGAN married Eliza March Quarter 1838, Westbury on Severn Registration District. Volume 11 Page 437.

Mike