Keithen is a distinctive boys' name in United States, ranking #5752 in 2000 with 12 recorded births. This places Keithen in the top 47% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2006 with 21 births ranking #4434. In 2000, approximately 1 in every 163,661 boys born was named Keithen. FALLING Recent data shows the name is currently falling.