Nicholaus is a distinctive boys' name in United States, ranking #5662 in 2010 with 16 recorded births. The name reached its all-time peak in 1999 with 88 births ranking #1364. Since 1996, the popularity has decreased by 80.5%. In 2010, approximately 1 in every 119,901 boys born was named Nicholaus. FALLING Recent data shows the name is currently falling.