Are you a military family? Those boys' names have a martial air.
Husband was a marine... He is also a mechanic and was raised in Texas
I like Axel better than Gunnar lol Gunnar just sounds weird to say for me. I do like both girl names! Surprisingly, I like Liberty a lot (I'm evidently very traditional in the names I choose lol Didn't know that till I had to choose myself), and you can shorten it to Lib or Libby as a nickname, too.
I like axel and and aurora, you could go rory for short but super duper cute (: