# Treacy (surname)

Source: https://namelineage.com/surname/treacy/  
Publisher: Name Lineage. Counts from the US Census Bureau; origin and etymology from Wiktionary; bearers from Wikidata. Data updated 2026-11-11.

A surname from Irish.

| Field | Value |
|---|---|
| Origin | Irish |
| Type | patronymic, formed from a father’s (or ancestor’s) given name |
| People in the US (2010 Census) | 1,619 |
| US rank (2010) | 17,428 of 162,253 |
| How often | about 1 in every 190,701 people |
| Change since 2000 | +12% (1,443 in 2000) |
| Pronunciation | not recorded |
| Variant spellings | none recorded |

## Etymology

Reduced Anglicized form of Irish Ó Treasaigh (“descendant of Treasach”), a personal name ultimately derived from treise (“strength, power”).

## Who carries it

Share of people named Treacy in the 2010 US Census by the Census's own race and ethnicity groups. The Census suppresses a share when the count behind it is small.

| Group | Share |
|---|---|
| White (not Hispanic) | 94% |
| Black (not Hispanic) | 0.7% |
| Hispanic or Latino (any race) | 3.1% |
| Two or more races | 1.1% |

## Where

Wikidata records people named Treacy in the United States.

## People named Treacy

- Emerson Treacy, actor (1900-1967)

## Similar surnames

Tracy, Tracey, Treece, Torres, Trejo, Torrez, Turk, Trice, Trask, Truax, Thrash, Towers.

## How to read these numbers

A Census count is people alive and counted in 2010, not births, and names occurring fewer than 100 times are not published at all. Ethnicity shares are the Census's own categories.