Janzen is a distinctive boys' name in United States, ranking #7463 in 1999 with 8 recorded births. The name reached its all-time peak in 1996 with 12 births ranking #5007. Since 1996, the popularity has decreased by 33.3%. In 1999, approximately 1 in every 240,011 boys born was named Janzen. STABLE Recent data shows the name is currently stable.