How common is the surname Hennessy?

9,338 people in the United States had the surname Hennessy in the 2010 Census, about 1 in every 33,063 Americans. It ranked 3,790th of 162,253 surnames.

What ethnicity is the surname Hennessy?

In the 2010 Census, 95% of people named Hennessy identified as white (not Hispanic), and 2.1% as Hispanic or Latino (any race).

How do you pronounce Hennessy?

Hennessy is /ˈhɛnəsi/, 3 syllables.

Is the surname Hennessy getting more or less common?

More common. 9,187 people carried it in the 2000 Census and 9,338 in 2010, up 1.6%.

The surname Hennessy

An Irish patronymic surname, carried by 9,338 people in the United States.

Pronounced /ˈhɛnəsi/ 3 syllables Soundex H520

Every surname held by 100 or more people in the 2010 US Census, most common on the left (162,253 in all). Hennessy is more common than 97.7% of them.

Origin

Irish origin

Anglicized from Irish Ó hAonghusa (“descendant of Angus”).

Hennessy is a patronymic surname: formed from a father’s (or ancestor’s) given name.

One of 880 Irish surnames on this site.

Origin from Wiktionary (CC BY-SA 4.0).

How common it is

2010 US Census

There were 9,338 people named Hennessy in the United States in 2010, about 1 in every 33,063 Americans. That is up 1.6% since 2000, when the Census counted 9,187.

#3,790

rank among US surnames

9,338

people in 2010

3.2

per 100,000 Americans

+1.6%

change since 2000 (was #3,550)

Rank	Surname	People	1 in
#3,782	Woodworth	9,361	32,982
#3,784	Thigpen	9,359	32,989
#3,785	André	9,358	32,993
#3,786	McGrew	9,354	33,007
#3,787	Scholl	9,351	33,017
#3,788	Tarver	9,341	33,053
#3,789	Clough	9,339	33,060

Who is named Hennessy

Race and Hispanic origin as people reported it in the 2010 Census

95% of people named Hennessy identified as white (not Hispanic), 2.1% as Hispanic or Latino (any race) and 1.4% as two or more races.

White (not Hispanic) 95%
Hispanic or Latino (any race) 2.1%
Two or more races 1.4%
Asian and Pacific Islander 0.9%
Black (not Hispanic) 0.6%
American Indian and Alaska Native 0.2%

Compare: most common surnames among white Americans.

Spellings and sound-alikes

Useful when a record has your ancestor under another spelling

Variant spellings

Hennessey

Surnames that sound like Hennessy

Hennessy has the Soundex code H520, the code US census indexes have used since the 1930s. Every surname with code H520.

Other Irish surnames

All 880 Irish surnames

Questions

Where does the surname Hennessy come from?: Anglicized from Irish Ó hAonghusa (“descendant of Angus”).
How common is the surname Hennessy?: 9,338 people in the United States had the surname Hennessy in the 2010 Census, about 1 in every 33,063 Americans. It ranked 3,790th of 162,253 surnames.
What ethnicity is the surname Hennessy?: In the 2010 Census, 95% of people named Hennessy identified as white (not Hispanic), and 2.1% as Hispanic or Latino (any race).
How do you pronounce Hennessy?: Hennessy is /ˈhɛnəsi/, 3 syllables.
What type of surname is Hennessy?: Hennessy is a patronymic surname, formed from a father’s (or ancestor’s) given name.
Is the surname Hennessy getting more or less common?: More common. 9,187 people carried it in the 2000 Census and 9,338 in 2010, up 1.6%.
What are other spellings of Hennessy?: Hennessey.