# Lenahan (surname)

Source: https://namelineage.com/surname/lenahan/  
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) | 2,647 |
| US rank (2010) | 11,821 of 162,253 |
| How often | about 1 in every 116,640 people |
| Change since 2000 | +9.9% (2,409 in 2000) |
| Pronunciation | not recorded |
| Variant spellings | Lenaghan, Leneghan, Lenehan |

## Etymology

Reduced Anglicized form of Irish Ó Leanacháin (“descendant of Leanachán”), probably derived from leann (“cloak”) and not from léanach (“sorrowful”).

## Who carries it

Share of people named Lenahan 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) | 0.3% |
| Hispanic or Latino (any race) | 2.7% |
| Asian and Pacific Islander | 0.5% |
| American Indian and Alaska Native | 0.2% |
| Two or more races | 1.4% |

## Similar surnames

Lenihan, Lehman, Lennon, Leaman, Lahman, Lemon, Limon, Lyman, Lanham, Layman, Lehmann, Lowman.

## 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.