Nicholaus is a distinctive boys' name in United States, ranking #3047 in 2008 with 39 recorded births. The name reached its all-time peak in 1999 with 88 births ranking #1364. Since 1996, the popularity has decreased by 52.4%. In 2008, approximately 1 in every 52,306 boys born was named Nicholaus. FALLING Recent data shows the name is currently falling.