Nicholaus is a distinctive boys' name in United States, ranking #2777 in 2004 with 38 recorded births. The name reached its all-time peak in 1999 with 88 births ranking #1364. Since 1996, the popularity has decreased by 53.7%. In 2004, approximately 1 in every 52,232 boys born was named Nicholaus. FALLING Recent data shows the name is currently falling.