Japheth is a distinctive boys' name in United States, ranking #2965 in 1998 with 27 recorded births. The name reached its all-time peak in 2007 with 51 births ranking #2488. Since 1996, the popularity has increased by 42.1%. In 1998, approximately 1 in every 70,790 boys born was named Japheth. STABLE Recent data shows the name is currently stable.