MOLLY.  A pet form of Mary (q.v.), meaning "bitter." (Personal and Family Names, Long, 1883).  Also see Moll, and Mollie.  Usage:  America, England, Great Britain, Ireland, Scotland, Wales.
    Mary Tyler "Molly" Ivins (d. 2007), was an American author, newspaper columnist, and political commentator.  Molly Cosette Dobbs, a fictional character on the British television soap opera, Coronation Street.  Molly Keane (d. 1996), was an Irish novelist and playwright.  Molly Pearson (d. 1959), was a Scottish actress.  Molly Parkin, a Welsh journalist, novelist, and painter. (Wiki)