Rheagan is a distinctive girls' name in United States, ranking #5891 in 2000 with 19 recorded births. The name reached its all-time peak in 2004 with 31 births ranking #4465. Since 1996, the popularity has increased by 72.7%. In 2000, approximately 1 in every 95,577 girls born was named Rheagan. FALLING Recent data shows the name is currently falling.