Nicholaus is a distinctive boys' name in United States, ranking #1809 in 2001 with 62 recorded births. The name reached its all-time peak in 1999 with 88 births ranking #1364. Since 1996, the popularity has decreased by 24.4%. In 2001, approximately 1 in every 31,336 boys born was named Nicholaus. FALLING Recent data shows the name is currently falling.