Nicolaus is a distinctive boys' name in United States, ranking #6967 in 2015 with 12 recorded births. The name reached its all-time peak in 1998 with 47 births ranking #2034. Since 1996, the popularity has decreased by 65.7%. In 2015, approximately 1 in every 159,688 boys born was named Nicolaus. STABLE Recent data shows the name is currently stable.