Gillyanne \gi-ll-yanne, gillya(n)-ne\ as a girl's name is a variant of Gillian (Latin), and the meaning of Gillyanne is "youthful".

The baby name Gillyanne sounds like Gillianne and Jillyanne. Other similar baby names are Lillyanne, Jillianne, Gillianna, Jillyanna, Jillanne, Giulianne, Kellyanne and Lilyanne.