Janson is a distinctive boys' name in United States, ranking #5071 in 2011 with 18 recorded births. This places Janson in the top 35% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2016 with 35 births ranking #3256. Since 1996, the popularity has decreased by 28.0%. In 2011, approximately 1 in every 105,499 boys born was named Janson. FALLING Recent data shows the name is currently falling.