Keithen is a distinctive boys' name in United States, ranking #6162 in 2012 with 14 recorded births. The name reached its all-time peak in 2006 with 21 births ranking #4434. Since 1996, the popularity has increased by 16.7%. In 2012, approximately 1 in every 135,473 boys born was named Keithen. FALLING Recent data shows the name is currently falling.