I love baby names too op! I could talk about them all day and I'm not even pregnant! If I ever have another baby, be prepared to see me on this board every day
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Rowan is having a bit of a moment. It does get shortened to Rowe usually. I like it. Atlas...is nice, but I don't like it with Rowan as it does sound a bit like road atlas or Rowan Atkinson.
Arlo is another trendy one which I really like. I don't like Jay. It does sound like filler / an initial. Arlo Jay Smith = Arlo J. Smith.
Rion shortened to Ry, so I'm guessing pronounced like Ryan? I don't like it. Don't like Ryan either, but Rion would be worse as a bit of a pain to have to spell out all the time. Leo is lovely and probably my favourite of all your names. I'd probably use that as a first name, maybe with Atlas as a middle name. Leo Atlas is nice I think.
Aurora is another one having a bit of a moment I think. I like it! I don't like Beau as a girls name, as I used to live in France and studied French at university, so I just find it jarring to use a masculine French word as a girl's name. That said, I've heard worse.
Koda is not great, sorry. Sounds like it is short for Dakota which is a name I don't like. I know an Aims, short for Aimee, which I quite like. Aimee as a first name?
Marley I don't like. Jade isn't to my taste either.
If you like surname names for girls though, how about Elliott, Blake or Riley?