Rheagan is a distinctive girls' name in United States, ranking #5560 in 2010 with 25 recorded births. The name reached its all-time peak in 2004 with 31 births ranking #4465. Since 1996, the popularity has increased by 127.3%. In 2010, approximately 1 in every 71,093 girls born was named Rheagan. FALLING Recent data shows the name is currently falling.