Nicholaus is a distinctive boys' name in United States, ranking #13332 in 2025 with 5 recorded births. The name reached its all-time peak in 1999 with 88 births ranking #1364. Since 1996, the popularity has decreased by 93.9%. In 2025, approximately 1 in every 341,615 boys born was named Nicholaus. FALLING Recent data shows the name is currently falling.