Diannah \di(an)-nah\ as a girl's name is a variant of Diana (Latin), and the meaning of Diannah is "divine".

The baby name Diannah sounds like Dannah and Dianna. Other similar baby names are Liannah, Dinah, Lianna, Leannah, Lannah, Cianna, Danna, Danah, Dianda, Deanna, Dionna, Dhanna, Dyanna, Dianne, Diann, Diahna, Dimonah, Gianna, Hannah, Channah, Ioannah, Jannah, Jianna, Kianna, Luannah, Reannah, Rianna, Rionnah, Shannah, Sianna, Sannah, Tianna, Vianna and Yoannah.