Allen is a distinctive boys' name in England & Wales, ranking #1377 in 2005 with 14 recorded births. This places Allen in the top 28% 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 40.0%. In 2005, approximately 1 in every 22,103 boys born was named Allen. FALLING Recent data shows the name is currently falling.