The Thomsen surname
In the 2010 U.S. Census, 7,654 people carried this name — #4,635 among all U.S. surnames, about 1 in every 38,600 people counted. About the same as in 2000 (7,624).
What the name means
The meaning of the Thomsen surname
A common surname originating as a patronymic.
Originally a patronymic from Thom or Thomas + -sen.
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Thomsen» (Danish), by Wiktionary contributors · licensed CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0) · excerpt, lightly adapted.
In Switzerland’s population statistics
123 people named Thomsen live in Switzerland.
They live in 10 of Switzerland’s 26 cantons, most of all in Zurich.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
Swiss Federal Statistical Office (FSO), «Surnames of the permanent resident population by canton», 2025, opendata.swiss/en/dataset/nachnamen-der-standigen-wohnbevolkerung-nach-kanton3 · names with fewer than 3 bearers in a canton are not published.
In Argentina’s national register
At least 89 people named Thomsen live in Argentina.
RENAPER only publishes a name in a province when more than ten people there share it, so the real number is higher. Most of them live in Buenos Aires Province.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.
In France’s civil register
France’s register of deaths holds 51 people named Thomsen.
18 of them were born outside France. Those born in France came from 13 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 the Nordic population registers
2,086 people named Thomsen are counted in Norway, Sweden and Finland.
Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published. Norway publishes only surnames with 200 or more bearers. Finland counts its citizens, at home or abroad.
Counted, by country
Own calculations based on data from Statistics Sweden (SCB), surnames with at least two bearers, 31 December 2022 — CC BY 4.0 (names with 20 or more bearers shown) · Statistics Norway (SSB, ssb.no), table 12891, 2025 — CC BY 4.0 · Digital and Population Data Services Agency (DVV), Finland, surname statistics, August 2026 — CC BY 4.0.
In print
Thomsen in American newspapers,
1917–1930.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 19,444 pages in all carry the name.
Who carried it
People named Thomsen,
with a public archive behind them.
-
Andreas Peter Thomsen 1781–1860 · judge -
Christian Jürgensen Thomsen 1788–1865 · numismatist -
Dini Thomsen d. 2021 · sculptor
-
Erica Thomsen d. 1992 · actor
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Hans Thomsen d. 1999 · politician
-
Clarita Thomsen d. 1925
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Thomsen.
- Thomas 756,142 · U.S. census
- Thomasson 4,844 · U.S. census
- Thome 3,163 · U.S. census
- Thomen 264 · U.S. census
- Thommes 255 · U.S. census
- Thompson 664,644 · U.S. census
- Thomson 24,750 · U.S. census
- Thon 1,066 · U.S. census
- Thong 1,378 · U.S. census
- Thony 173 · U.S. census
- Thor 2,823 · U.S. census
- Thore 243 · U.S. census
When the index is not enough
This page says where Thomsen 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.