Sydnie \s(y)-dnie, syd-nie\ as a girl's name is a variant of Sydney (Old English), and the meaning of Sydnie is "wide meadow".

The baby name Sydnie sounds like Sidnie, Sydnee and Cydnie. Other similar baby names are Sannie, Cydnee, Sinnie, Cynnie, Sadie, Saydie, Sidni, Sydonia, Sidonie, Sivnie, Sonnie, Sunnie and Sidnee.