lol, yes, they were probably named Marie Louise or Marie Madeleine or Marie X whatever, and didn't like their names so just went by Marie. Happened a lot, one of my ancestresses was only known by Marie, but suddently on her funeral she is Marie Marguerite, and her sister is there for the burial, so probably the source of the corrected name. Since we don't have baptisms, it will have to remain as is.