Regan is a distinctive girls' name in England & Wales, ranking #506 in 2000 with 57 recorded births. The name reached its all-time peak in 2004 with 61 births ranking #528. Since 1996, the popularity has increased by 83.9%. In 2000, approximately 1 in every 4,793 girls born was named Regan. FALLING Recent data shows the name is currently falling.