Total births
222
Boys' name · since 1915
Tatsuo
222 babies named Tatsuo in U.S. Social Security records since 1915, with the highest year being 1916. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- 222
- total births
- 1915–1940
- years on record
- 1920s
- peak decade
- 50%
- born in that decade
Tatsuo is not among the current top-ranked boys names; 222 have been recorded since 1915.
Social Security Administration records show Tatsuo recorded 222 times among boys since 1915, though it doesn't currently rank among the most-used boys names, peaking in the 1920s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1915 to 1940.
- 222 total births
- 1915–1940 years on record
- 1920s peak decade
- 50% born in that decade
Data updated Jun 2026
The verdict
222 boys have been named Tatsuo since 1915, peaking in the 1920s, last recorded in 1940.
- 222
- total births
- 1915–1940
- years on record
- 1920s
- peak decade
- 50%
- born in that decade
1920s
Peak decade
50% of everyone ever named Tatsuo was born in this single decade.
1916
Single peak year
57 babies were named Tatsuo in 1916 - its busiest year on record.
Tatsuo's usage pattern, beyond the headline number
Splitting Tatsuo's full recorded timeline at 1923, 45% of its total births fall in the more recent half of the record versus 55% in the earlier half -- a fairly even split across the full record. Its quietest year on record was 1915, with just 6 recorded births -- worth weighing against the 1916 peak of 57 to see the full range of the name's swing in popularity.
Tatsuo at a glance
Last recorded 1940Peak year
1916
Current rank
Unranked
Active since
1915
Tatsuo popularity over time
Annual U.S. births registered with the Social Security Administration · 1915–1940
- Peak year (1916)
- 57
- Annual births at peak, across 26 years of records
Tatsuo by decade
Total births in each ten-year window, peak vs trough at a glance
1920s was Tatsuo's strongest decade.
112 babies received the name during that ten-year window, about 50% of all-time use.
Tatsuo births by decade
Total births in each ten-year window
- 1910s
1910s
97 births
- 1920s
1920s
112 births
- 1930s 7
1930s
7 births
- 1940s 6
1940s
6 births
What this shows Peak: 1920s at 112 births (50% of all-time use).
Tatsuo by state
Where Tatsuo concentrates geographically, total births since 1915
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Hawaii | | 111 | 50.0% |
| #2 | California | | 36 | 16.2% |
Hawaii share of Tatsuo's total US births 50.0%
Even split
111 of 222 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
How popular is the name Tatsuo? ▼
Since 1915, Social Security records show 222 babies named Tatsuo. The most recent recorded year was 1940. Its busiest year on record was 1916, with 57 births.
When was Tatsuo most popular? ▼
Tatsuo was most popular in the 1920s decade with 112 total births. The single peak year was 1916.
Where is Tatsuo most popular? ▼
The top states for the name Tatsuo are Hawaii (111 births), California (36 births).
How long has the name Tatsuo been used? ▼
The SSA has tracked Tatsuo since 1915 -- 26 years through the most recent 1940 data.
What names are similar to Tatsuo? ▼
Names with a similar sound or spelling include Tate, Tatum, Taten, Tatem, and 4 more. These share a common prefix and are also used for boys.
What to do with Tatsuo's data
- Tatsuo's decade-level peak was the 1920s (112 total births); usage has since declined to 6 in the 1940s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Hawaii records the most Tatsuos (111 births) -- see the full state breakdown if geography matters to your decision. Hawaii names
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Tatsuo
Nearby Names Like Tatsuo
Names with a similar sound, spelling, or feel to Tatsuo
Tate Boy
#210 27,400 births
Tatum Boy
#195 13,225 births
Taten Boy
#6036 590 births
Tatem Boy
#11550 310 births
Tatsuya Boy
104 births
Compare Tatsuo side by side: Tatsuo vs Tate Tatsuo vs Tatum Tatsuo vs Taten
Related Names
Names with a similar number of total births
Data Sources
Data as of June 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1915–1940 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Tatsuo: Baby Name Since 1915 - 222 Births, Peak 1916." NameAlmanac. Accessed via https://namealmanac.com/name/tatsuo. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Tatsuo draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.