Dear Mr. Shinkaruk,
Thank you for posting your request on History Hub!
For the information you seek, we suggest you contact The National Archives of the United Kingdom, Kew, Richmond, Surrey, TW9 4DU, United Kingdom in order to obtain information about his marriage and the name of his wife.
You also may wish to search the FamilySearch wiki Cornwall, England Genealogy Records website for additional information and/or resources.
We hope this is helpful. Best of luck with your research!