boy name ideas ?

I’m currently pregnant with twin boys and struggling for names

I have two boys already :

8yr old kingston

3yr old phoenix

I have fallen inlove with rowen for one of the twins but am struggling to find another name i like. My boyfriend likes Onyx but i feel like it’s too similar to phoenix , I like Remi but don’t know how much i actually like it.

We aren’t too big on the twins need to have matching first letter names or names that “rhyme” together but would like a name that goes with rowen that sounds nice and is also unique