Hayden would make a wonderful First name. I am a mom with 6 children and most have either long or unusual names. My oldest daughter is Tammarra Starr Sue-Rose LOL plus she has 2 last names LOL.
Something like mixing up the names and making it one would be a great way to mix it up a little as well, IE: Thurden, or Arten or something of that sorts.
I love the name Kyrdan (the mix of Kyle and Jordan).
even if it was a girl you could do Kaydence (take of the H and add the ce at the end) like Kaydence Lorrayne or if it was a boy do something like Arten Mickeal . Hope that helps and congrats on the baby!!!