Rhiann is a distinctive girls' name in England & Wales, ranking #789 in 1997 with 29 recorded births. The name reached its all-time peak in 1996 with 35 births ranking #671. Since 1996, the popularity has decreased by 17.1%. In 1997, approximately 1 in every 10,110 girls born was named Rhiann. STABLE Recent data shows the name is currently stable.