Rheagan is a distinctive girls' name in United States, ranking #6524 in 2012 with 20 recorded births. The name reached its all-time peak in 2004 with 31 births ranking #4465. Since 1996, the popularity has increased by 81.8%. In 2012, approximately 1 in every 88,037 girls born was named Rheagan. FALLING Recent data shows the name is currently falling.