I have only the dates of our ROM in our wedding rings. My parents had both their names in their. It was unusual and cool to have your wedding vows in your wedding rings. It helps to remind each other the commitments made on your wedding day.
Anyway, here is the site that offer to engrave your wedding vows on your wedding ring. They even have a big list of vows you can choose from or custom your own vows on your only rings.