Milly \m(il)-ly\ as a girl's name is a variant of Amelia (Latin, Old German), Camilla (Latin), Emily (Latin), Melissa (Greek), Mildred (Old English) and Millicent (Old French), and the meaning of Milly is "industrious, striving; work; helper to the priest; rival; laborious; eager; bee; honey; gentle strength; brave strength".

The baby name Milly sounds like Milli, Mille, Milla, Molly, Melly and Mally. Other similar baby names are Billy, Cilly, Gilly, Hilly, Jilly, Lilly, Tilly and Willy.