Thanks for your suggestions! I love
Marguerite Ottoline and
Marguerite Antonia.
Marguerite means
Daisy in French, and that's where we got the idea from. I now realize
Marguerite may seem a bit pretentious without the backstory. My husband is from
France, and is insisting that we use a French name this time around.
He suggested
Nino, which is a common first name on its own in his country, though I would like it as a nickname. I like
Nino Renato and
Nino Charles from your list.