Census records give the wife of Joseph Ellis as Susan / Susanna, of of Great Gaddesden, Hertfordshire dob 1808 - 10. They will have married at about 1830.
There are several trees and records behind the Ancestry pay wall of potential briedes, but when checked out on FamilySearch the marriage is too early or the location is wrong. I drew a blank on https://www.freereg.org.uk/.
Any help finding Susan will be gratefully recieved.