Margot is definitely my favorite spelling. This is the correct French variation of Margaret. Margo is an Americanized spelling which just looks unfinished to me.
I like Margot, too. Margaux Hemingway's name was originally spelled Margot, after one of the characters in one of her grandfather's short stories. But, she changed the spelling to Margaux after the wine label Chateau Margaux, which her parents supposedly drank the night she was conceived. Anyway, when she gave up alcohol, she went back to the Margot spelling. So, she didn't make up the spelling, exactly, but she did alter her birth name.
Margot is definitely my favorite spelling. This is the correct French variation of Margaret. Margo is an Americanized spelling which just looks unfinished to me.