Meaning and name origin
Rianon \ri(a)-non\ as a girl's name is of Welsh origin, and the meaning of Rianon is "great queen, or goddess". Rianon is a variant of Rhiannon (Welsh); mythology: the title Rigantona "great queen" is borne by a Celtic goddess of fertility.
Rianon is not a popular first name for females and an equally uncommon surname or last name for all people (2000 U.S. Census).
Displayed below is a comparison of the popularity of the girl name Rianon and its variant forms. The only popular variation form ranked in the Top 1000/100 is Rhiannon. (2014 statistics).