1. I think
Holly is very sweet! It ages well and is one of my favorite botanical choices.
2. I'm in the US, but I wouldn't say it's dated. I only know one
Holly, and she is a mom, but the name has never felt dated.
3.
Holly over
Hollie by a mile; it's the name of the plant, and
Hollie looks fake.
4. I think it's definitely appropriate for a
Christmas baby, but I also think it's appropriate for a baby born in
July. I don't think it's too cutesy, not any cutesier than
Noelle or any other Christmas-related name.