Allen is a distinctive boys' name in England & Wales, ranking #1377 in 2005 with 14 recorded births. The name reached its all-time peak in 2007 with 22 births ranking #1079. Since 1996, the popularity has increased by 40.0%. In 2005, approximately 1 in every 22,103 boys born was named Allen. FALLING Recent data shows the name is currently falling.