Keithen is a distinctive boys' name in United States, ranking #6718 in 2001 with 10 recorded births. The name reached its all-time peak in 2006 with 21 births ranking #4434. Since 1996, the popularity has decreased by 16.7%. In 2001, approximately 1 in every 194,283 boys born was named Keithen. FALLING Recent data shows the name is currently falling.