Declining since 2016.
Popularity of Tamsin since 1955
Babies named Tamsin per year in U.S. Social Security records.
Data table (by decade)
| Decade | Girls |
|---|---|
| 1950s | 13 |
| 1960s | 22 |
| 1970s | 18 |
| 1980s | 21 |
| 1990s | 26 |
| 2000s | 77 |
| 2010s | 173 |
| 2020s | 63 |
Meaning & origin
Tamsin is a Cornish and English name that first appeared in U.S. records in 1955. While it has never ranked in the national top 1000, it has maintained consistent if modest usage. The name reached its peak popularity in 2017, followed by a gradual decline since 2016. Tamsin is a medieval contraction of Thomasina, making it a distinct and less common feminine form of Thomas. Its mild revival in recent decades aligns with a broader interest in vintage and Cornish names.
Tamsin is a Cornish and English diminutive of Thomasina, itself the feminine form of Thomas, which derives from the Aramaic t'om'a, meaning 'twin'. The name was historically common in Cornwall and the West Country of England, where it was used as a vernacular form. It has seen modern revival, particularly in the United Kingdom.
Nicknames & variants
Nicknames: Tam, Tammy, Sim
Sibling names for Tamsin
Names that share Tamsin's style, for a brother or sister.
