Keithen is a distinctive boys' name in United States, ranking #5381 in 2004 with 15 recorded births. The name reached its all-time peak in 2006 with 21 births ranking #4434. Since 1996, the popularity has increased by 25.0%. In 2004, approximately 1 in every 132,320 boys born was named Keithen. FALLING Recent data shows the name is currently falling.