Nicolaus is a distinctive boys' name in United States, ranking #8598 in 2014 with 9 recorded births. This places Nicolaus in the bottom 39% 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 74.3%. In 2014, approximately 1 in every 213,382 boys born was named Nicolaus. STABLE Recent data shows the name is currently stable.