Nicholaus is a distinctive boys' name in United States, ranking #1315 in 1997 with 87 recorded births. This places Nicholaus in the top 12% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1999 with 88 births ranking #1364. In 1997, approximately 1 in every 21,668 boys born was named Nicholaus. FALLING Recent data shows the name is currently falling.