Surely, you can’t be serious. 
I did too, but they got divorced. Not the name thing, though; he beat her up.
My parents were Bob and Bobbie. My dad’s family all called him Bobby.
When I was in college, I was at one point seeing a girl named Debbie and a girl who then went by Kathy*. My brother was engaged (and later married) to a Debbie, and my sister’s name is Kathy. I explained to my mother that I was trying to keep things simple for her.
*Later, she gave up on the Kathy experiment and went back to Katherine, which she had been her whole life. Somewhat later, we married. Much later, we divorced.
I am serious. And don’t call me Shirley.
Always introduce yourselves as Mr. and Mrs. Chris Lastname.
I’m Jamie, married to James. My husband goes by his middle name, though, so it’s only awkward in paperwork.
Especially when alone.
I knew a couple who were both named Vaughan (first name).
I used to know a couple named Jason and Jason; when in doubt we specified by their lastnames’ initials. Knowing their sense of humor, if they’ve gotten married (now that they can), they will have chosen the same lastname for both…
I worked with an engaged couple named Jillian and Julian. Close enough 
I know a couple - unmarried or civil partnered but together forever - who are Jane Smith and Jane Smith.
I have an Uncle Mike, married to Aunt Mikey.
My parents’ names are Michael and Michele, which is close. However, nobody calls dad “Michael” except Grandma and his sisters.
Back when Tom Cruise was dating Penelope Cruz, an interviewer asked her, if they got married, would she keep her maiden name, take his, or hyphenate?
I’ve only known one couple with the same name- he was Gerard and she was Geraldine, but they both went by “Gerry.”
My maternal grandparents had the same last name (before they were married, I mean). They were from a very small village in a thinly populated rural part of a somewhat isolated country. I’m pretty sure everyone in the village was related, one way or another. There were probably only about four last names in the whole town.