Rhiannon is a distinctive girls' name in United States, ranking #1310 in 2024 with 175 recorded births. The name reached its all-time peak in 1999 with 651 births ranking #424. Since 1996, the popularity has decreased by 41.1%. In 2024, approximately 1 in every 9,218 girls born was named Rhiannon. STABLE Recent data shows the name is currently stable.