Nicolaus is a distinctive boys' name in United States, ranking #5988 in 2017 with 15 recorded births. The name reached its all-time peak in 1998 with 47 births ranking #2034. Since 1996, the popularity has decreased by 57.1%. In 2017, approximately 1 in every 123,354 boys born was named Nicolaus. STABLE Recent data shows the name is currently stable.