Kieffer is a distinctive boys' name in United States, ranking #7736 in 1997 with 7 recorded births. The name reached its all-time peak in 1996 with 16 births ranking #4111. Since 1996, the popularity has decreased by 56.3%. In 1997, approximately 1 in every 269,299 boys born was named Kieffer. FALLING Recent data shows the name is currently falling.