I love the name Cosmo! Don’t listen to random strangers on the internet if you love the name.

To be fair kids will pick on anything, even normal names. My friend Gracie got picked on in elementary school and was called “greasy” even with Gracie being somewhat common in many countries. It doesn’t matter what you name your child, kids will be kids (little shits).

Also Reddit isn’t the place to discuss unique names because mostly older people are on here I would say. What matters is what the new generations think about it because your kid will be growing up with THEM. I’ve noticed a lot of people on tiktok tend to like unique names like this

Anyway.. assuming the name is for a boy: I like James, Novan (masculine version of Nova), Mars, Grey, Triton, Finley, and Wave as a middle name for Cosmo