Regan is a distinctive girls' name in England & Wales, ranking #508 in 1998 with 54 recorded births. The name reached its all-time peak in 2004 with 61 births ranking #528. Since 1996, the popularity has increased by 74.2%. In 1998, approximately 1 in every 5,355 girls born was named Regan. FALLING Recent data shows the name is currently falling.