MallowbyNames

Tamsyn

TAM-zin · Tamsyn is the feminine form of Thomas, meaning 'twin'.

Peak popularity
2019
Usually for
Girls
Trend
Declining since 2016

Declining since 2016.

Popularity of Tamsyn since 1976

Babies named Tamsyn per year in U.S. Social Security records.

51015198020002020Most births 2016Girls
Data table (by decade)
DecadeGirls
1970s37
1980s25
1990s6
2000s11
2010s69
2020s32

Meaning & origin

Tamsyn is a rare feminine name first recorded in the United States in 1976. It has never entered the top 1,000, with its peak usage occurring in 2019. The name is falling in recent years, with a downward trajectory since 2016. Tamsyn is a modern variant of Tamsin and Tamzin, which themselves are Cornish diminutives of Thomasina. Its meaning, 'twin', ties it to a long tradition of Thomas-derived names. Despite its low frequency, Tamsyn appeals to parents seeking a distinctive yet familiar-sounding name with a touch of Cornish heritage.

Tamsyn is a modern feminine elaboration of Thomas, derived from the Aramaic t'om'a, meaning 'twin'. While Tamzin and Tamsin have historical Cornish origins as diminutives of Thomasina, the Tamsyn spelling emerged more recently in the 20th century, reflecting a stylistic preference for 'y' endings in English coinages.

Nicknames & variants

Nicknames: Tam, Tams, Tammy

Variants: Tamsin, Tamzin, Thomasina

Sibling names for Tamsyn

Names that share Tamsyn's style, for a brother or sister.

A parent animal hugging its little one, the personalized name page

T is for Tamsyn, our favorite little girl.

T is for Tamsyn…”

In a Mallowby alphabet book, Tamsyn's letter becomes Tamsyn's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Tamsyn's book

Books for siblings or grandkids? The second book is 15% off.

Questions parents ask

What does the name Tamsyn mean?
Tamsyn means 'twin', derived as a feminine form of Thomas.
How popular is the name Tamsyn?
Tamsyn first appeared in U.S. records in 1976 but has never ranked in the top 1,000. Its peak year was 2019, though it has been falling in usage since 2016.
Is Tamsyn a boy's or girl's name?
Tamsyn is almost exclusively used as a girl's name.