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    The surname Hennessey

    An Irish patronymic surname, carried by 8,357 people in the United States.

    3 syllables Soundex H520

    Hennessey: #4,245 of 162,253 surnames in the 2010 US Census #1Smith#160,975Doriott#10Martinez#100Jimenez#1,000Archer#10,001Dubon Hennessey #4,245, 8,357 people Hennessey: #4,245 of 162,253 surnames in the 2010 US Census #1Smith#160,975Doriott#100Jimenez Hennessey #4,245, 8,357 people
    Every surname held by 100 or more people in the 2010 US Census, most common on the left (162,253 in all). Hennessey is more common than 97.4% of them.

    Origin

    Irish origin

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

    Hennessey 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 8,357 people named Hennessey in the United States in 2010, about 1 in every 36,945 Americans. That is up 4.0% since 2000, when the Census counted 8,036.

    #4,245
    rank among US surnames
    8,357
    people in 2010
    2.8
    per 100,000 Americans
    +4%
    change since 2000 (was #4,076)
    RankSurnamePeople1 in
    #4,240Hales8,36336,918
    #4,241Nemeth8,36236,922
    #4,242Wingate8,35936,936
    #4,245Hennessey8,35736,945

    Who is named Hennessey

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

    95% of people named Hennessey identified as white (not Hispanic), 2.4% as Hispanic or Latino (any race) and 1.3% as two or more races.

    • White (not Hispanic) 95%
    • Hispanic or Latino (any race) 2.4%
    • Two or more races 1.3%
    • Black (not Hispanic) 0.8%
    • Asian and Pacific Islander 0.7%
    • 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

    Surnames that sound like Hennessey

    Hennessey 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 Hennessey come from?
    Anglicized from Irish Ó hAonghusa (“descendant of Angus”).
    How common is the surname Hennessey?
    8,357 people in the United States had the surname Hennessey in the 2010 Census, about 1 in every 36,945 Americans. It ranked 4,245th of 162,253 surnames.
    What ethnicity is the surname Hennessey?
    In the 2010 Census, 95% of people named Hennessey identified as white (not Hispanic), and 2.4% as Hispanic or Latino (any race).
    What type of surname is Hennessey?
    Hennessey is a patronymic surname, formed from a father’s (or ancestor’s) given name.
    Is the surname Hennessey getting more or less common?
    More common. 8,036 people carried it in the 2000 Census and 8,357 in 2010, up 4.0%.