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    The surname Kilduff

    An Irish patronymic surname, carried by 1,336 people in the United States.

    2 syllables Soundex K431

    Kilduff: #20,029 of 162,253 surnames in the 2010 US Census #1Smith#160,975Doriott#10Martinez#100Jimenez#1,000Archer Kilduff #20,029, 1,336 people Kilduff: #20,029 of 162,253 surnames in the 2010 US Census #1Smith#160,975Doriott#100Jimenez Kilduff #20,029, 1,336 people
    Every surname held by 100 or more people in the 2010 US Census, most common on the left (162,253 in all). Kilduff is more common than 87.7% of them.

    Origin

    Irish origin

    Reduced Anglicized form of Irish Mac Giolla Duibh (“son of the black-haired lad”), from giolla (“boy, lad”) and dubh (“black”).

    Kilduff 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 1,336 people named Kilduff in the United States in 2010, about 1 in every 231,097 Americans. That is up 8.6% since 2000, when the Census counted 1,230.

    #20,029
    rank among US surnames
    1,336
    people in 2010
    0.5
    per 100,000 Americans
    +8.6%
    change since 2000 (was #20,152)
    RankSurnamePeople1 in
    #20,029Mangini1,336231,097
    #20,037Hirschfeld1,335231,270

    Who is named Kilduff

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

    97% of people named Kilduff identified as white (not Hispanic), 1.6% as Hispanic or Latino (any race).

    • White (not Hispanic) 97%
    • Hispanic or Latino (any race) 1.6%
    • Two or more races 0.8%
    • Asian and Pacific Islander 0.5%
    The Census suppresses very small shares to protect privacy; Black, Native American are not shown.

    Compare: most common surnames among white Americans.

    Spellings and sound-alikes

    Useful when a record has your ancestor under another spelling

    Variant spellings

    • Kildow

    Kilduff has the Soundex code K431, the code US census indexes have used since the 1930s. Every surname with code K431.

    Other Irish surnames

    All 880 Irish surnames

    Questions

    Where does the surname Kilduff come from?
    Reduced Anglicized form of Irish Mac Giolla Duibh (“son of the black-haired lad”), from giolla (“boy, lad”) and dubh (“black”).
    How common is the surname Kilduff?
    1,336 people in the United States had the surname Kilduff in the 2010 Census, about 1 in every 231,097 Americans. It ranked 20,029th of 162,253 surnames.
    What ethnicity is the surname Kilduff?
    In the 2010 Census, 97% of people named Kilduff identified as white (not Hispanic), and 1.6% as Hispanic or Latino (any race).
    What type of surname is Kilduff?
    Kilduff is a patronymic surname, formed from a father’s (or ancestor’s) given name.
    Is the surname Kilduff getting more or less common?
    More common. 1,230 people carried it in the 2000 Census and 1,336 in 2010, up 8.6%.
    What are other spellings of Kilduff?
    Kildow.