Nicolaus is a distinctive boys' name in United States, ranking #4547 in 2009 with 22 recorded births. The name reached its all-time peak in 1998 with 47 births ranking #2034. Since 1996, the popularity has decreased by 37.1%. In 2009, approximately 1 in every 90,150 boys born was named Nicolaus. STABLE Recent data shows the name is currently stable.