Allen is a distinctive boys' name in England & Wales, ranking #2005 in 2002 with 6 recorded births. The name reached its all-time peak in 2007 with 22 births ranking #1079. Since 1996, the popularity has decreased by 40.0%. In 2002, approximately 1 in every 48,048 boys born was named Allen. FALLING Recent data shows the name is currently falling.