Girl names!?

Br

I find out on April 8th what we’re having! I have a boy name picked out, but can’t seem to settle on a girl name we like! We have 3 girls already, and hoping that this is our boy; this pregnancy has been different than my girls, but still not 100% certain. My husband likes names with A and S, we already have a Sophia and an Ava. I like different names, like Madison, or Harper, and even suggested Addison or Savannah, but he didn’t like any of them! Help, please :)