Rheagan is a distinctive girls' name in United States, ranking #4507 in 2003 with 29 recorded births. The name reached its all-time peak in 2004 with 31 births ranking #4465. Since 1996, the popularity has increased by 163.6%. In 2003, approximately 1 in every 63,002 girls born was named Rheagan. FALLING Recent data shows the name is currently falling.