What was the source for you post on J. Davis?
I checked the medal roll again. There is a Gunner John Davis #2732 who died 31-10-79 and a Gunner Isaac Davis #1634 who was killed on 22-1-79.
If your source is using the initial only for the first name, then it is possible that the “I” was mistaken for a “J”. (Those two letters look very similiar on the medal roll, which is hand written.) I would post a copy of the medal roll, but it is locked and I can’t copy that page.
Petty Officer Tom