Rowan too close to Bowen?

So basically our niece (my partner’s twin brother’s daughter) who we’re extremely close to has a cousin on her mum’s side called Rowan, who she’s very close to.

I absolutely love the name Bowen (nn. Bowie) for if/when we have a baby boy because they will be our rainbow baby!

Would it be strange for her to have cousins with rhyming names even if they’re on different sides of the family? Am I overthinking this?🤣