The Nicolai surname
In the 2000 U.S. Census, 2,042 people carried this name — #13,628 among all U.S. surnames, about 1 in every 131,600 people counted.
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In France’s civil register
France’s register of deaths holds 1,788 people named Nicolai.
123 of them were born outside France. Those born in France came from 58 départements, most often Corsica.
Where it concentrates, on the mapWhere they were born
Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.
In Belgium’s population register
At least 274 people named Nicolai live in Belgium.
Statbel only publishes a name in a municipality when five or more people there share it, so the real number is higher. Most of them live in Antwerp.
Where they live today
Statbel (Statistics Belgium), family names of the population by municipality, 1 January 2026 — CC BY 4.0.
In Switzerland’s population statistics
77 people named Nicolai live in Switzerland.
They live in 10 of Switzerland’s 26 cantons, most of all in Zurich.
Where they live today
Swiss Federal Statistical Office (FSO), «Surnames of the permanent resident population by canton», 2025, opendata.swiss · names with fewer than 3 bearers in a canton are not published.
Nearby in the index
Surnames next to Nicolai.
- Nicklaus 794 · U.S. census
- Nickler 154 · U.S. census
- Nickles 3,931 · U.S. census
- Nico 289 · U.S. census
- Nicol 4,850 · U.S. census
- Nicola 1,837 · U.S. census
- Nicolaou 399 · U.S. census
- Nicolas 5,783 · U.S. census
- Nicolau 286 · U.S. census
- Nicolay 844 · U.S. census
- Nicolazzi 142 · U.S. census
- Nicole 570 · U.S. census
When the index is not enough
This page says where Nicolai is.
A volume says what happened to it.
Every page in the index is free and stays free. The Heritage Volume is the long form: the full paper trail, the arms, the crossing — bound, and yours.