I like
Holly a lot. I’m in the US, and it’s probably a bit dated, but it was never popular enough to feel like it definitely belongs in one era. I have known 2 - one
Holly who is about 30 and one Holli or
Hollie (can’t remember exactly) who is closer to 40 - and they were both cool, cheerleader types, so that’s what I think of. I don’t have any particular notes about how I think their parents would be. And I definitely prefer the spelling
Holly.
I think
Holly is also strongly associated with
Christmas, so she might get questions about being born in December, but that’s not the worst thing in the world. Most people like
Christmas!
Of the names you listed, I like
Holly the best. I do think all 3 of those names are very similar for sisters. If it was just 2 of them, it would be fine, though.