Wow! Haha I woke up from my daily afternoon pregnancy nap and wasn’t expecting so many answers, what a nice surprise
Thank you everyone whose commented - you all bring up points I’ve thought of myself and am considering. We’re definitely are in a more “nickname” generation, aren’t we?
One of the big things is that so few people know Daisy is a nickname for Margaret, and I don’t like that they start with different letters. None of the other “Margaret” nicknames appeal to me either...
I’m pretty strongly leaning towards using Daisy as a standalone name, I love the poster who said it’s a good thing to have a happy association with a name

I love that!
Thank you all so much for your input, it means a lot!