It can be hard to figure out who’s who with the knottie user names!
Log in to TheKnot, hover over My Knot, and click Account Settings. If you are having issues doing it that way, you can email support@thebump.com and ask them to change your username. Give them a few suggestions just in case your top choice is taken. It may take up to 24 hours for the name to update.
Re: How to change your knottie58984788 username