Vonnie \v(on)-nie\ as a girl's name is a variant of Veronica (Latin) and Vondra (Czechoslovakian), and the meaning of Vonnie is "true image; womanly; brave".
The baby name Vonnie sounds like Vinnie, Vannie and Vonni. Other similar baby names are Bonnie, Connie, Donnie, Nonnie, Jonnie, Lonnie, Ronnie and Sonnie.