Nicolaus is a distinctive boys' name in United States, ranking #4218 in 2004 with 21 recorded births. The name reached its all-time peak in 1998 with 47 births ranking #2034. Since 1996, the popularity has decreased by 40.0%. In 2004, approximately 1 in every 94,514 boys born was named Nicolaus. STABLE Recent data shows the name is currently stable.