Rheagan is a distinctive girls' name in United States, ranking #4465 in 2004 with 31 recorded births. The name reached its all-time peak in 2004 with 31 births ranking #4465. Since 1996, the popularity has increased by 181.8%. In 2004, approximately 1 in every 59,230 girls born was named Rheagan. FALLING Recent data shows the name is currently falling.