Sergei is a distinctive boys' name in United States, ranking #5596 in 1999 with 12 recorded births. This places Sergei in the top 48% 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 16 births ranking #4378. In 1999, approximately 1 in every 160,007 boys born was named Sergei. STABLE Recent data shows the name is currently stable.