Is our name too similar??!

We decided on our girl name months ago (7months pregnant atm) but then my husband asked last night if it’s too similar to his cousin’s little girls name and now I can’t stop wondering!

We really want the name Elle. Short, sweet and simple but their girl is called Ella! Does this matter? We see them once a year...

(I could be stressing over nothing as we haven’t found out the gender but I love having everything sorted)