I like
Holly. I have only met one and she wasn't born around
Christmas but she hates when at
Christmas time everyone sings
Holly Jolly
Christmas around her. I think of
Holly more as a plant name like
Lily,
Rose, or
Ivy. Not like a certain time of year name, so it seems perfectly fine to use it all year round. As for names like
May,
Summer,
Autumn, etc. I'm torn because it seems rather silly to name your kid
Autumn if she was born in
Spring but it seems very uncreative and uncaring to just name your kid about what ever season they were born. Like you didn't really think about it. I don't know but I do find many of those names lovely like
May,
August (on a girl),
Summer,
Autumn, and lately
June has been on my radar.