Third boy name help

Need help naming our potentially third boy. Currently have an Ollie and and Emmett. We are think of A names to keep the vowels going, but open to other possibilities.

A names we like Arlo or Atticus, but is Arlo too close to Ollie?

We also like Oscar or Ellis but not sure if we want to repeat an O or E name.

I also like Julian.

Thanks for your ideas and kind opinions!