Janzen is a distinctive boys' name in United States, ranking #7941 in 1998 with 7 recorded births. The name reached its all-time peak in 1996 with 12 births ranking #5007. Since 1996, the popularity has decreased by 41.7%. In 1998, approximately 1 in every 273,045 boys born was named Janzen. STABLE Recent data shows the name is currently stable.