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Name Lineage

    The surname Ildefonso

    A Spanish surname, carried by 627 people in the United States.

    4 syllables Soundex I431

    Ildefonso: #35,812 of 162,253 surnames in the 2010 US Census #1Smith#160,975Doriott#10Martinez#100Jimenez#1,000Archer#10,001Dubon Ildefonso #35,812, 627 people Ildefonso: #35,812 of 162,253 surnames in the 2010 US Census #1Smith#100Jimenez Ildefonso #35,812, 627 people
    Every surname held by 100 or more people in the 2010 US Census, most common on the left (162,253 in all). Ildefonso is more common than 77.9% of them.

    Origin

    Spanish origin

    Borrowed from the Spanish personal name Ildefonso. This surname is mostly found in the Philippines.

    One of 992 Spanish surnames on this site.

    Origin from Wiktionary (CC BY-SA 4.0).

    How common it is

    2010 US Census

    There were 627 people named Ildefonso in the United States in 2010, about 1 in every 492,417 Americans. That is up 33% since 2000, when the Census counted 473.

    #35,812
    rank among US surnames
    627
    people in 2010
    0.2
    per 100,000 Americans
    +32.6%
    change since 2000 (was #43,058)

    Who is named Ildefonso

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

    71% of people named Ildefonso identified as Hispanic or Latino (any race), 22% as Asian and Pacific Islander and 5.9% as white (not Hispanic).

    • Hispanic or Latino (any race) 71%
    • Asian and Pacific Islander 22%
    • White (not Hispanic) 5.9%
    • Two or more races 1.4%
    The Census suppresses very small shares to protect privacy; Black, Native American are not shown.

    Compare: most common surnames among Hispanic and Latino Americans.

    Other Spanish surnames

    All 992 Spanish surnames

    Questions

    Where does the surname Ildefonso come from?
    Borrowed from the Spanish personal name Ildefonso. This surname is mostly found in the Philippines.
    How common is the surname Ildefonso?
    627 people in the United States had the surname Ildefonso in the 2010 Census, about 1 in every 492,417 Americans. It ranked 35,812th of 162,253 surnames.
    What ethnicity is the surname Ildefonso?
    In the 2010 Census, 71% of people named Ildefonso identified as Hispanic or Latino (any race), and 22% as Asian and Pacific Islander.
    Is the surname Ildefonso getting more or less common?
    More common. 473 people carried it in the 2000 Census and 627 in 2010, up 33%.