Delete an email contact that doesn't show up in contact search box.

[Android Central Question]

All of a sudden my email app is pulling up my husband's unused Icloud email address rather than his Gmail address. He doesn't use iCloud address at all yet it pops up when I enter his name into Gmail address box. When I go to contact app to remove the iCloud address from his contact info, it isn't there. When I use search box in contact app with his iCloud address, it says no contact exists in my contact list with that address. How can I edit (delete) this contact if I can't pull it up?