Rheagan is a distinctive girls' name in United States, ranking #6047 in 2007 with 23 recorded births. The name reached its all-time peak in 2004 with 31 births ranking #4465. Since 1996, the popularity has increased by 109.1%. In 2007, approximately 1 in every 83,585 girls born was named Rheagan. FALLING Recent data shows the name is currently falling.