Tamsin
A medieval contraction of Thomasina, a feminine form of Thomas, revived in the UK in the twentieth century.
Every Tamsin since 1955 — 413 of them. Popularity, births, and rankings for each year, from official Social Security records.
The story of Tamsin
Tamsin is not currently in use for newborns in the United States — fewer than five babies received the name in 2025. Its story lives in the historical record below.
Since 1955, 413 American babies have been named Tamsin. Its peak came in 2017, when 27 newborns received the name — the signature sound of the 2010s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Tamsin stood among all girls' names in any year, or use the compare tool to plot it against other names.
Tamsin year by year
Every year since 2001, and five-year steps back to 1880. Rank is within each sex.
| Year | Girls | Girls rank |
|---|---|---|
| 2025 | — | — |
| 2024 | 7 | #13,343 |
| 2023 | 8 | #12,077 |
| 2022 | 14 | #7,991 |
| 2021 | 14 | #7,993 |
| 2020 | 20 | #6,059 |
| 2019 | 21 | #5,959 |
| 2018 | 17 | #7,075 |
| 2017 | 27 | #5,035 |
| 2016 | 23 | #5,776 |
| 2015 | 22 | #6,013 |
| 2014 | 19 | #6,679 |
| 2013 | 14 | #8,525 |
| 2012 | 13 | #9,067 |
| 2011 | 8 | #13,234 |
| 2010 | 9 | #12,161 |
| 2009 | 9 | #12,345 |
| 2008 | 11 | #10,730 |
| 2007 | 9 | #12,576 |
| 2006 | 8 | #13,489 |
| 2005 | 12 | #9,389 |
| 2004 | 9 | #11,523 |
| 2003 | 7 | #13,705 |
| 2002 | — | — |
| 2001 | 7 | #13,355 |
| 2000 | 5 | #17,349 |
| 1995 | — | — |
| 1990 | — | — |
| 1985 | — | — |
| 1980 | 6 | #10,241 |
| 1975 | — | — |
| 1970 | 6 | #7,892 |
| 1965 | — | — |
| 1960 | — | — |
| 1955 | 5 | #6,621 |
| 1950 | — | — |
| 1945 | — | — |
| 1940 | — | — |
| 1935 | — | — |
| 1930 | — | — |
| 1925 | — | — |
| 1920 | — | — |
| 1915 | — | — |
| 1910 | — | — |
| 1905 | — | — |
| 1900 | — | — |
| 1895 | — | — |
| 1890 | — | — |
| 1885 | — | — |
| 1880 | — | — |
Famous people named Tamsin
- Tamsin Egerton Actor · b. 1990
- Tamsin Greig Actor · b. 1966
Ranked by global fame across Wikipedia editions (Pantheon project, MIT).
Frequently asked questions
What does the name Tamsin mean?
A medieval contraction of Thomasina, a feminine form of Thomas, revived in the UK in the twentieth century.
How popular is the name Tamsin in 2025?
Tamsin did not appear in the 2025 Social Security data, which means fewer than five babies received the name that year.
How many people are named Tamsin?
413 babies have been named Tamsin in the United States since 1955, based on Social Security card applications.
When was the name Tamsin most popular?
Tamsin peaked in 2017, when 27 newborns received the name.
Is Tamsin a boy or girl name?
Tamsin is overwhelmingly a girl's name — 100% of babies with the name.
Is the name Tamsin rising or falling?
Tamsin is declining — less popular now than a decade ago.
Who are famous people named Tamsin?
Well-known people named Tamsin include Tamsin Egerton (actor), Tamsin Greig (actor).