# Greenan (surname)

Source: https://namelineage.com/surname/greenan/  
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) | 813 |
| US rank (2010) | 29,138 of 162,253 |
| How often | about 1 in every 379,761 people |
| Change since 2000 | -0.4% (816 in 2000) |
| Pronunciation | not recorded |
| Variant spellings | Grennan |

## Etymology

Reduced Anglicized form of Irish Ó Grianáin (“descendant of Grianán”), a personal name derived from Irish grianán (“person of sunny disposition”), a diminutive form of grian (“sun”).

## Who carries it

Share of people named Greenan 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) | 96% |
| Hispanic or Latino (any race) | 1.9% |
| Two or more races | 1.0% |

## Similar surnames

Grennan, Greenman, Greening, Gorman, German, Garman, Germain, Garmon, Germany, Geronimo, Germann, Germano.

## 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.