Nicolaus is a distinctive boys' name in United States, ranking #4021 in 2005 with 23 recorded births. The name reached its all-time peak in 1998 with 47 births ranking #2034. Since 1996, the popularity has decreased by 34.3%. In 2005, approximately 1 in every 86,832 boys born was named Nicolaus. STABLE Recent data shows the name is currently stable.