The Ionescu surname
In the 2000 U.S. Census, 627 people carried this name — #34,210 among all U.S. surnames, about 1 in every 434,800 people counted.
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In Belgium’s population register
At least 192 people named Ionescu 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 Brussels-Capital.
Where it concentrates, on the mapWhere 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
190 people named Ionescu live in Switzerland.
They live in 14 of Switzerland’s 26 cantons, most of all in Zurich.
Where it concentrates, on the mapWhere 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.
In France’s civil register
France’s register of deaths holds 80 people named Ionescu.
Most of them — 69 — were born outside France. Those born in France came from 5 départements, most often Paris.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they were born
Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.
In print
Ionescu in American newspapers,
1907–1937.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 254 pages in all carry the name.
Who carried it
People named Ionescu,
with a public archive behind them.
-
Nicolae Ionescu 1820–1905 · politician -
Take Ionescu 1858–1922 · writer -
Thoma Ionescu 1860–1926 · anesthesiologist -
Constantin Ionescu-Lungu 1862–1938 · teacher -
Alexandru Ionescu 1862–1929 · trade unionist
Wikidata and Wikimedia Commons (CC0) · 216 lives in all are documented under this name.
Nearby in the index
Surnames next to Ionescu.
- Inigo 235 · U.S. census
- Iniguez 6,621 · U.S. census
- Innocent 1,056 · U.S. census
- Innocenti 535 · U.S. census
- Innocenzi 231 · U.S. census
- Insalaco 767 · U.S. census
- Iori 173 · U.S. census
- Iorio 2,229 · U.S. census
- Iovino 1,282 · U.S. census
- Iparraguirre 187 · U.S. census
- Ippolito 4,159 · U.S. census
- Iraola 242 · U.S. census
When the index is not enough
This page says where Ionescu 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.