# O'Neil (surname)

Source: https://namelineage.com/surname/oneil/  
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 [in turn originating as a patronymic], a variant of O'Neill.

| Field | Value |
|---|---|
| Origin | Irish |
| Type | patronymic, formed from a father’s (or ancestor’s) given name |
| People in the US (2010 Census) | 28,949 |
| US rank (2010) | 1,220 of 162,253 |
| How often | about 1 in every 10,665 people |
| Change since 2000 | +3.3% (28,020 in 2000) |
| Pronunciation | not recorded |
| Variant spellings | none recorded |

## Etymology

See O'Neill

## Who carries it

Share of people named O'Neil 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) | 88% |
| Black (not Hispanic) | 6.5% |
| Hispanic or Latino (any race) | 2.7% |
| Asian and Pacific Islander | 0.6% |
| American Indian and Alaska Native | 0.5% |
| Two or more races | 1.8% |

## Where

Wikidata records people named O'Neil in the United States and Australia.

## People named O'Neil

- Barbara O'Neil, actress (1910-1980)
- Titus O'Neil, American wrestler and football player
- Chris O'Neil, Australian tennis player (born 1956)
- Cathy O'Neil, American mathematician
- Sally O'Neil, actress (1908-1968)
- April O'Neil, American pornographic actress
- Kitty O'Neil, American racing driver and stuntwoman (1946–2018)
- John O'Neil, American rugby union player (1898–1950)
- Dennis O'Neil, American comics writer (1939–2020)
- Nance O'Neil, actress (1874-1965)
- Tricia O'Neil, American actress (b. 1945)
- Clare O'Neil, Australian politician

and 1 more on Wikidata.

## Similar surnames

O'Neill, O'Neal, O'Malley.

## 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.