# O'Shaughnessy (surname)

Source: https://namelineage.com/surname/oshaughnessy/  
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 | not recorded |
| People in the US (2010 Census) | 3,246 |
| US rank (2010) | 9,940 of 162,253 |
| How often | about 1 in every 95,116 people |
| Change since 2000 | +6.6% (3,045 in 2000) |
| Pronunciation | not recorded |
| Variant spellings | none recorded |

## Etymology

From Irish Ó Seachnasaigh.

## Who carries it

Share of people named O'Shaughnessy 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) | 95% |
| Black (not Hispanic) | 0.5% |
| Hispanic or Latino (any race) | 2.4% |
| Two or more races | 1.2% |

## Where

Wikidata records people named O'Shaughnessy in the United States.

## People named O'Shaughnessy

- Tam O'Shaughnessy, American educator, children's science writer, professional tennis player
- Terrence J. O'Shaughnessy, American Air Force general
- Colleen O'Shaughnessey, American voice actress

## 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.