Rheagan is a distinctive girls' name in United States, ranking #6104 in 2011 with 22 recorded births. The name reached its all-time peak in 2004 with 31 births ranking #4465. Since 1996, the popularity has increased by 100.0%. In 2011, approximately 1 in every 79,946 girls born was named Rheagan. FALLING Recent data shows the name is currently falling.