Jaan is a distinctive boys' name in United States, ranking #6739 in 1999 with 9 recorded births. This places Jaan in the bottom 42% 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 12 births ranking #6627. In 1999, approximately 1 in every 213,343 boys born was named Jaan. FALLING Recent data shows the name is currently falling.