Allen is a distinctive boys' name in England & Wales, ranking #1505 in 1999 with 8 recorded births. The name reached its all-time peak in 2007 with 22 births ranking #1079. Since 1996, the popularity has decreased by 20.0%. In 1999, approximately 1 in every 37,904 boys born was named Allen. FALLING Recent data shows the name is currently falling.