Keithen is a distinctive boys' name in United States, ranking #4752 in 2011 with 20 recorded births. The name reached its all-time peak in 2006 with 21 births ranking #4434. Since 1996, the popularity has increased by 66.7%. In 2011, approximately 1 in every 94,949 boys born was named Keithen. FALLING Recent data shows the name is currently falling.