Billy

♂ Boy

Pronounced BIL-ee /ˈbɪl.i/High

Meaning: Resolute protector; English pet form of William, from Germanic Willahelm (wil: will, desire + helm: helmet, protection)High

In 30 seconds: An English pet form of William meaning 'resolute protector.' Casual and friendly, Billy has been a classic American nickname-name for generations — associated with Billy the Kid, Billy Joel, and Billy Graham.

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Origin HighGermanic, English

MeaningResolute protector; English pet form of William, from Germanic Willahelm (wil: will, desire + helm: helmet, protection)

U.S. rank (2025)#1068 ↘ Falling

2025 U.S. births203 boys (0.01% of U.S. boys)

Peak year1934

Total births (all-time)≈ 384,228

Popularity in the U.S. · SSA data

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Billy is an English diminutive of William, from Germanic Willahelm (will: desire + helm: helmet/protection). The tradition of using B- initial diminutives for W- names is an English medieval convention (William → Bill → Billy).

Billy was in the U.S. top 50 from the 1930s through the 1970s and has declined. It ranked #1047 for boys in 2024.

Did you know? Billy the Kid (William H. Bonney, 1859–1881) is one of American frontier mythology's most romanticized outlaws — despite a life of violent crime, his youth, daring, and eventual killing by Pat Garrett made him a legend whose name Billy has carried ever since.

Overall data confidence 94%

Behind the Name — Billy — Germanic etymologyU.S. Social Security Administration — popularity data

Variations

WilliamWillBill

Nicknames

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Famous Bearers

★Billy Joel (1949–present)
American singer-songwriter, known as the Piano Man. Among the best-selling music artists of all time, with hits including Piano Man (1973) and It's Still Rock and Roll to Me (1980).

If you like Billy…

Will— the short form of the same William root

Beau— two-syllable -y/-eau ending name with the same casual American charm

Jimmy— two-syllable -y ending nickname-name from the same mid-century tradition

Bobby— two-syllable -y ending nickname-name from the same generation

Explore names like Billy

By themeenglish classic two-syllable germanic diminutive

By meaningProtector

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Frequently Asked

What does the name Billy mean?

Billy means 'resolute protector,' as an English pet form of William, from Germanic Willahelm (will: desire + helm: protection).

How do you pronounce Billy?

It's said BIL-ee — two syllables, stress on the first.

Is Billy a boy or girl name?

Billy is used primarily as a boys' name.

How popular is Billy?

Billy ranked #1047 for U.S. boys in 2024.