I don't like it much.
I have January as my top GP boy's name, but March I don't like because it's a verb as well. March, marching, marching bands...
Just like how I love
Summer and
Autumn, and
Winter is okay, but
Spring never sounds good to me cos it it being a verb.
Marjorie nn March is okay, better than March being a full first name.
Mary nn March is kind of odd though. It doesn't link at all to me. I'd never use
Charles as a name for a girl! Even if it's a family name, there are female versions of it.