Allen is a distinctive boys' name in England & Wales, ranking #1410 in 2003 with 11 recorded births. This places Allen in the top 31% 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 2003, approximately 1 in every 27,230 boys born was named Allen. FALLING Recent data shows the name is currently falling.