Gillianne \gi(l)-lianne, gill(ian)-ne\ as a girl's name is a variant of Gillian (Latin), and the meaning of Gillianne is "youthful".

The baby name Gillianne sounds like Jillianne, Gillyanne, Gillianna and Giulianne. Other similar baby names are Lillianne, Dillianna, Jillyanne, Jillianna, Jilliann, Jilliane, Jillanne, Giulianna, Lillianna, Lilliann, Lilliane and Sallianne.