Nikolai is a moderately popular boys' name in United States, ranking #476 in 2015 with 629 recorded births. The name reached its all-time peak in 2016 with 639 births ranking #480. Since 1996, the popularity has increased by 667.1%. In 2015, approximately 1 in every 3,047 boys born was named Nikolai. STABLE Recent data shows the name is currently stable.