Gillie \gi(l)-lie\ as a girl's name is a variant of Gilberte (Old German) and Gillian (Latin), and the meaning of Gillie is "bright promise; youthful".

The baby name Gillie sounds like Jillie, Callie, Kallie, Collie, Gallia, Gilia, Gilly, Gill, Giulia, Giullia, Jilli, Jullie and Kellie. Other similar baby names are Aillie, Millie, Billie, Lillie, Tillie and Willie.