How do you write a husband and wife's name?

The surname of the man who is the husband is used to call the women that's is the wife. So if the husband is called Mr. Williams Kennedy, where Williams is his surname then the wife would be that. In this case the two would be called Mr. and Mrs Williams. You can write it two ways: Mr. and Mrs. the guy's last name, or Mr. and Mrs. the guy's first and last name.