Tatsuo
- Last seen for boys in 1940 at #3,130
- Peak · boys
- 1916 · 57 births
- Debut · boys
- 6 births
- In top 100 · boys
- neverof 146 years
- Total births · boys
- 222since 1915
Tatsuo over time
boys
Rank among boys' names. Tatsuo has never cracked the top 800 here.
Hover or use arrow keys to read values by year; click or press Enter to open that year.
Gaps mean fewer than 5 babies received the name that year, so the SSA doesn't publish it.
Show data table
| Year | boys | |
|---|---|---|
| rank | births | |
| 2025 | — | |
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| 1940 | #3,130 | 6 |
| 1939 | — | |
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| 1931 | — | |
| 1930 | #3,289 | 7 |
| 1929 | #3,247 | 7 |
| 1928 | #1,125 | 39 |
| 1927 | #3,151 | 8 |
| 1926 | #2,904 | 9 |
| 1925 | #3,155 | 8 |
| 1924 | #3,867 | 6 |
| 1923 | #2,950 | 9 |
| 1922 | #3,532 | 7 |
| 1921 | #2,502 | 12 |
| 1920 | #3,489 | 7 |
| 1919 | #3,115 | 8 |
| 1918 | #1,998 | 16 |
| 1917 | #2,562 | 10 |
| 1916 | #824 | 57 |
| 1915 | #3,392 | 6 |
| 1914 | — | |
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| 1880 | — | |
First appearance
1915
The first year at least five boys were named Tatsuo! It came in at #3,392, and was given to 6 baby boys.
Quietest stretch: 1931–1939, when fewer than 5 boys a year got the name.
Where Tatsuo is popular in 2025
No state had 5 or more boys named Tatsuo in 2025, so the SSA doesn't publish it for any state.
See more about Tatsuo
Momentum · boys
Faded out
- Not published in 2025; last seen 1940
- Biggest jump: 2,568 spots in 1916
- Biggest drop: 1,738 spots in 1917
Rise & fade · boys
1 yr to peak
- Debuted 1915
- Peaked 1916 at #824 (57 births)
- Births halved by 1917, 1 yr later
Top of the charts · boys
Top 1,000 for 1 yr
- Top 10: never
- Top 100: never
- Top 1,000: 1 yr · 1916
Share of babies · boys
1 in 15,615
- Highest: 1 in 15,615 boys born in 1916 were named Tatsuo (0.01%)
- Latest: 1 in 193,195 boys born in 1940 (0.00%)
Era · boys
The 1920s
- 50.5% of all boys named Tatsuo (112) were born in this decade
Show by decade
| Decade | Births | Best rank | Avg rank |
|---|---|---|---|
| 1910s | 97 | #824 (1916) | #2,378 |
| 1920s | 112 | #1,125 (1928) | #2,992 |
| 1930s | 7 | #3,289 (1930) | #3,289 |
| 1940s | 6 | #3,130 (1940) | #3,130 |
All figures count published births only (names given to at least 5 boys in a year). Registrations before 1937 are incomplete, so early shares and totals run low.
Want to check a specific year?
See where Tatsuo ranked and which names it was up against. Click a point on the chart, or pick a year: