Nicholaus is a distinctive boys' name in United States, ranking #1992 in 2002 with 56 recorded births. The name reached its all-time peak in 1999 with 88 births ranking #1364. Since 1996, the popularity has decreased by 31.7%. In 2002, approximately 1 in every 34,669 boys born was named Nicholaus. FALLING Recent data shows the name is currently falling.