Recorded 1921–1929 Boys' name Peak 1921 11 births

Mas — boys' name

11 babies named Mas in U.S. Social Security records since 1921, with the highest year being 1921. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.

1920s11

The verdict

11 boys have been named Mas since 1921, peaking in the 1920s, last recorded in 1929.

11
total births
1921–1929
years on record
1920s
peak decade
100%
born in that decade
1920s
Peak decade

100% of everyone ever named Mas was born in this single decade.

1921
Single peak year

6 babies were named Mas in 1921 — its busiest year on record.

What the Data Says About Mas

The Social Security Administration has registered 11 babies named Mas between 1921 and 1929, spanning 9 consecutive years of U.S. birth records. As a boy's name, Mas currently falls outside the top 1,000 boys' names for 1929. The name reached its historical peak in 1921, when 6 babies received it in a single year.

Decade-level aggregation shows that Mas performed strongest in the 1920s, accumulating 11 births during that ten-year window. Geographically, the name is most concentrated in California, which accounts for 5 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Mas in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Mas 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 11 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.

Mas at a glance

Last recorded 1929

Total births

11

Since 1921

9 years of records

Peak year

1921

6 births that year

Strongest decade: 1920s

Current rank

Unranked

Outside the modern top-1,000

As of 1929

Active since

1921

Recorded for 9 years

Last year on file: 1929

Mas popularity over time

Annual U.S. births registered with the Social Security Administration · 1929–1921

Last recorded 1929
Peak year (1921)
6
Annual births at peak — across 9 years of records
4.555.566.5 19291921 6

Mas by decade

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

Peak: 1920s
Peak decade
1920s
11 births that decade — 100% of Mas's all-time total
1920s11

Mas by state

Where Mas concentrates geographically — total births since 1921

Regionally concentrated
Top 1 states by recorded births for the name Mas
Rank State Visual share Births Share of total
#1 California
5 45.5%
California share of Mas's total US births 45.5%

5 of 11 births nationwide.

Frequently Asked Questions

How popular is the name Mas?
11 babies have been named Mas since 1921. It was last recorded in 1929. The peak year was 1921 with 6 births.
When was Mas most popular?
Mas was most popular in the 1920s decade with 11 total births. The single peak year was 1921.
Where is Mas most popular?
The top states for the name Mas are California (5 births).
How long has the name Mas been used?
Mas has been recorded in Social Security data since 1921, spanning 9 years of data through 1929.
What names are similar to Mas?
Names with a similar sound or spelling include Mason, Massimo, Masen, Masyn, and 4 more. These share a common prefix and are also used for boys.

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, 1921–1929 (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.