Baby boy name help!

Brooklynn

We are expecting our fourth boy and I am completely running out of names that I love! Our current son's names are:

Oaklynn Kai (nn Oak)

Barrett Rhys (nn Bear)

Wren Karson

So we arent to into normal but also not trying to go to far out there with names. We know the middle name will be Rayn/Rayne. The first name is the part we are stuck on.