Christmas \ch-rist-mas, chr(is)-tmas\ as a girl's name (also used as boy's name Christmas), is of Old English origin. Name of the holiday, used occasionally for December 25 babies, but now more usually replaced by the French form, Noel. See also Natalie. Baby names that sound like Christmas are Christmar, Christa, Christan, Christna and Christal. View a list of the 6 names that reference Christmas.