Janzen is a distinctive boys' name in United States, ranking #13138 in 2011 with 5 recorded births. The name reached its all-time peak in 1996 with 12 births ranking #5007. Since 1996, the popularity has decreased by 58.3%. In 2011, approximately 1 in every 379,798 boys born was named Janzen. STABLE Recent data shows the name is currently stable.