Recorded 1971–1980 Unisex name Peak 1977 44 births

Billyjo — unisex name

44 babies named Billyjo in U.S. Social Security records since 1971, with the highest year being 1977. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.

1970s371980s7
1970s
Peak decade

84% of everyone ever named Billyjo was born in this single decade.

1977
Single peak year

11 babies were named Billyjo in 1977 — its busiest year on record.

What the Data Says About Billyjo

The Social Security Administration has registered 44 babies named Billyjo between 1971 and 1980, spanning 10 consecutive years of U.S. birth records. As a girl's name, Billyjo currently falls outside the top 1,000 girls' names for 1980. The name reached its historical peak in 1977, when 11 babies received it in a single year. Billyjo is classified as unisex in SSA records: the opposite-sex variant accounts for 34 additional births since 1971.

Decade-level aggregation shows that Billyjo performed strongest in the 1970s, accumulating 37 births during that ten-year window. Across the 2 decades of recorded activity, Billyjo shows a clear decline from its mid-century high.

No etymological entry is currently available for Billyjo in our reference dataset. These figures derive from SSA's annual national and state-level name files, which include any name appearing at least five times in a given year or state-year; names below that threshold are suppressed for privacy and therefore excluded from the totals shown here. The 44 total represents a lower bound — actual usage may be higher in years or states where the count fell below the disclosure floor. This page is provided for informational and research purposes only and does not constitute personal, legal, or naming advice.

Billyjo at a glance

Last recorded 1980

Total births

44

Since 1971

10 years of records

Peak year

1977

11 births that year

Strongest decade: 1970s

Current rank

Unranked

Outside the modern top-1,000

As of 1980

Active since

1971

Recorded for 10 years

Last year on file: 1980

Billyjo popularity over time — girls

Annual U.S. births registered with the Social Security Administration · 1980–1971

Last recorded 1980
Peak year (1977)
11
Annual births at peak — across 10 years of records
4681012 198019781977197619751971 9

Billyjo popularity over time — boys

34 total births recorded since 1971 (Billyjo as boys' name)

Unisex variant — 34 births
4.555.566.577.5 198119801979197619751971 5

Billyjo by decade

Total births in each ten-year window — peak vs trough at a glance

Peak: 1970s
Peak decade
1970s
37 births that decade — 84% of Billyjo's all-time total
1970s371980s7

Frequently Asked Questions

How popular is the name Billyjo?
44 babies have been named Billyjo since 1971. It was last recorded in 1980. The peak year was 1977 with 11 births.
When was Billyjo most popular?
Billyjo was most popular in the 1970s decade with 37 total births. The single peak year was 1977.
Is Billyjo a unisex name?
Yes, Billyjo is used for both boys and girls. As a girl's name it has 44 births, and as a boy's name it has 34 births.
How long has the name Billyjo been used?
Billyjo has been recorded in Social Security data since 1971, spanning 10 years of data through 1980.
What names are similar to Billyjo?
Names with a similar sound or spelling include Billie, Billy, Billye, Billi, and 4 more. These share a common prefix and are also used for girls.

Data Sources

Data as of 2024. Source: U.S. Social Security Administration (SSA).

Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications — National Data, 1971–1980 (ssa.gov/oact/babynames). National-level data includes all names with 5 or more occurrences in a given year.

State-level: Source: U.S. Social Security Administration, Baby Names — State-Level Files (namesbystate.zip). Includes all names with 5 or more occurrences per state per year; rarer names are excluded for privacy.