Nicolaus is a distinctive boys' name in United States, ranking #4975 in 2010 with 19 recorded births. This places Nicolaus in the top 35% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 47 births ranking #2034. Since 1996, the popularity has decreased by 45.7%. In 2010, approximately 1 in every 100,969 boys born was named Nicolaus. STABLE Recent data shows the name is currently stable.