Jansen is a distinctive boys' name in United States, ranking #1630 in 1998 with 64 recorded births. The name reached its all-time peak in 1997 with 66 births ranking #1560. Since 1996, the popularity has increased by 14.3%. In 1998, approximately 1 in every 29,864 boys born was named Jansen. FALLING Recent data shows the name is currently falling.