Denni \d(en)-ni\ as a girl's name is a variant of Dena (Old English) and Denise (French), and the meaning of Denni is "valley; follower of Dionysius".

The baby name Denni sounds like Danni, Denna, Denny, Dennie, Deni and Donni. Other similar baby names are Benni, Jenni and Genni.