Fortnie \f(o)-rt-nie, for-tnie\ as a girl's name is a variant of Fortney (Latin), and the meaning of Fortnie is "strong".

The baby name Fortnie sounds like Fortnee, Fortny, Fortnea and Fortune. Other similar baby names are Cortnie, Kourtnie, Kortni, Courtnie, Cortnee and Franie.