Allen is a distinctive boys' name in England & Wales, ranking #1110 in 2004 with 17 recorded births. This places Allen in the top 23% of ranked UK boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2007 with 22 births ranking #1079. Since 1996, the popularity has increased by 70.0%. In 2004, approximately 1 in every 18,146 boys born was named Allen. FALLING Recent data shows the name is currently falling.