Japheth is a distinctive boys' name in United States, ranking #2899 in 1999 with 29 recorded births. The name reached its all-time peak in 2007 with 51 births ranking #2488. Since 1996, the popularity has increased by 52.6%. In 1999, approximately 1 in every 66,210 boys born was named Japheth. STABLE Recent data shows the name is currently stable.