How do I revert one of my contact's name back to its original name he set on his "Contact Card"

So as mentionned in the title, I have a contact that has set up his "Contact Card", but then I modified his last name by mistake, and I'm wondering if there's a way to revert back to the oringinal name that he set up...

I tried deleting the name entirely but it just leaves it blank, it doesn't offer me the option to update it with his initial Contact Card information... Any help would be greatly appreciated!