Allen is a distinctive boys' name in England & Wales, ranking #2216 in 2013 with 9 recorded births. This places Allen in the top 37% 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. In 2013, approximately 1 in every 37,063 boys born was named Allen. FALLING Recent data shows the name is currently falling.