Rheagan is a distinctive girls' name in United States, ranking #5267 in 2015 with 26 recorded births. The name reached its all-time peak in 2004 with 31 births ranking #4465. Since 1996, the popularity has increased by 136.4%. In 2015, approximately 1 in every 68,641 girls born was named Rheagan. FALLING Recent data shows the name is currently falling.