Rhiann \r-hiann, rhi(a)-nn\ as a girl's name is a variant of Rhiannon (Welsh), and the meaning of Rhiann is "great queen, or goddess".
The baby name Rhiann sounds like Rhianna, Rhiana, Rhiane and Riann. Other similar baby names are Rhianon, Raeann, Rayann, Rhia, Rianon, Rianne, Rianna, Riane, Riana, Rhyan, Rhiannan, Rheanne, Rheanna, Ryann, Riayn and Rian.