Nicholaus is a distinctive boys' name in United States, ranking #2539 in 2003 with 41 recorded births. The name reached its all-time peak in 1999 with 88 births ranking #1364. Since 1996, the popularity has decreased by 50.0%. In 2003, approximately 1 in every 48,177 boys born was named Nicholaus. FALLING Recent data shows the name is currently falling.