Girl's name

Treasa

“TRASS-a”

used as the Irish form of Teresa; sometimes read as 'strength'

TeresaToirdhealbhach (m. cognate)

The story behind the name

Adopted widely in the 19th and 20th centuries as the Irish for Teresa, after the Spanish saint — one of many names that entered Irish through devotion rather than descent.

Surnames built on this name

Treacy · Ó Treasaigh

Quick answers

How do you pronounce Treasa?

Treasa is pronounced “TRASS-a”. Irish has three main dialect groups (Ulster, Connacht and Munster) and many names are said differently in each. The respellings here give the pronunciation most commonly heard in Irish English; where a well-known variant exists, both are shown.

What does the name Treasa mean?

Treasa means used as the Irish form of Teresa; sometimes read as 'strength'.

Is Treasa a boy's or a girl's name?

Treasa is traditionally a girl's name in Ireland.

How popular is the name Treasa in Ireland?

Treasa was the number 885 girls' name in the Republic of Ireland in 2025, from number 402 ten years earlier. Its best year was 1964, at number 19. Source: the CSO's register of names given three or more times.

How else is Treasa spelled?

Other spellings and equivalents include Teresa, Toirdhealbhach (m. cognate). Irish names were written down by English-speaking clerks for centuries, which is why so many spellings survive for one name.

In the register

#885 for girls in 2025 (#402 in 2015) · best: #19 in 1964

The full register → CSO, Republic of Ireland, names given three or more times.

Meanings follow Ó Corráin & Maguire's Irish Names and Woulfe; pronunciations give the commonest Irish-English form. Know this name better — a dialect pronunciation, a family tradition? Tell us. · All Irish names A–Z