Rhyming cousin names…weird?!

[Gymandtonic00]

Help!
Our baby girl is due in a month and we really like a name. Only issue is, it rhymes with my nephew’s name (think Marnie and Barney).
My nephew is 8, so there will be a bit of an age gap, and although we don’t live near to him, we are a close family. My mum and dad will have 6 grandchildren, including our new baby, and I don’t want it to be weird for them when they are talking about their grandchildren.
My husband and I really love the name but I’m worried about my sister in law’s reaction as she can be a little vocal about things she’s not keen on. I don’t know if she’ll think it’s weird.
Am I the one who’s being weird-my husband thinks we should just use the name- or do you think it’s an issue?

Three of my first cousins were named the same name - Charles - after their mutual grandfather. They were called Charlie, CJ (Charles Junior) and Chip (off the old block). No problems telling them apart and when they grew up Charlie had a son Charles called Trey (Charles 3rd).

That wouldn't even cross my mind as being an issue.
My daughter and my nephew are 3 weeks apart. Their names both end in -gan.
My sister and I just see it as funny that we have the same taste!