Rianon \ri(a)-non\ as a girl's name is a variant of Rhiannon (Welsh), and the meaning of Rianon is "great queen, or goddess".

The baby name Rianon sounds like Riannon and Rhianon. Other similar baby names are Riann, Ninon, Nanon, Manon, Reannon, Rianne, Rianna, Riane, Riana, Rhiann, Ryann, Riayn, Rian and Shanon.