In the Unknown origin, Massie means "Massie \m(as)-sie\ as a boy's name is a variant of Massey. See for origin and meaning of Massie.
The baby name Massie sounds like Mosie, Mace, Moss, Mays, Mose and Moise. Other similar baby names are Gussie, Casshe, Cassio, Mannie, Jessie, Kasie, Mackie, Mattie, Maurie, Maxie, Massimo and Ossie."