Theo
#5,722 for girls in 2025, 21 births · #82 for boys in 2025, 3,945 births
Given to boys 91.1% of the time
- Peak · boys
- 2023 · 4,140 births
- Debut · boys
- 9 births
- In top 100 · boys
- 4 yrsof 146 years
- Total births · boys
- 35,830since 1880
Theo over time
Rank within each sex, plotted together. Click any year to open it.
Gaps mean fewer than 5 babies received the name that year, so the SSA doesn't publish it.
Show data table
| Year | girls | boys | ||
|---|---|---|---|---|
| rank | births | rank | births | |
| 2025 | #5,722 | 21 | #82 | 3,945 |
| 2024 | #4,473 | 31 | #80 | 4,129 |
| 2023 | #3,640 | 42 | #78 | 4,140 |
| 2022 | #3,220 | 50 | #98 | 3,642 |
| 2021 | #2,674 | 64 | #142 | 2,703 |
| 2020 | #3,450 | 44 | #172 | 2,225 |
| 2019 | #4,437 | 31 | #195 | 2,018 |
| 2018 | #12,464 | 7 | #243 | 1,554 |
| 2017 | #12,713 | 7 | #290 | 1,232 |
| 2016 | #9,411 | 11 | #354 | 952 |
| 2015 | — | #405 | 765 | |
| 2014 | — | #509 | 550 | |
| 2013 | — | #663 | 365 | |
| 2012 | — | #790 | 287 | |
| 2011 | — | #863 | 245 | |
| 2010 | — | #914 | 221 | |
| 2009 | — | #1,032 | 187 | |
| 2008 | — | #1,019 | 188 | |
| 2007 | — | #1,012 | 191 | |
| 2006 | — | #1,116 | 156 | |
| 2005 | — | #1,150 | 139 | |
| 2004 | — | #1,172 | 133 | |
| 2003 | — | #1,291 | 109 | |
| 2002 | #15,432 | 5 | #1,346 | 98 |
| 2001 | — | #1,460 | 84 | |
| 2000 | — | #1,282 | 101 | |
| 1999 | — | #1,489 | 76 | |
| 1998 | — | #1,642 | 63 | |
| 1997 | — | #1,628 | 62 | |
| 1996 | — | #1,740 | 53 | |
| 1995 | — | #1,623 | 56 | |
| 1994 | — | #1,664 | 54 | |
| 1993 | — | #1,721 | 50 | |
| 1992 | — | #1,510 | 59 | |
| 1991 | #13,147 | 5 | #1,452 | 61 |
| 1990 | — | #1,370 | 66 | |
| 1989 | — | #1,219 | 77 | |
| 1988 | — | #1,145 | 77 | |
| 1987 | — | #1,106 | 75 | |
| 1986 | — | #1,003 | 85 | |
| 1985 | — | #1,057 | 76 | |
| 1984 | — | #2,232 | 23 | |
| 1983 | — | #1,955 | 27 | |
| 1982 | — | #1,734 | 33 | |
| 1981 | — | #1,811 | 31 | |
| 1980 | — | #1,619 | 36 | |
| 1979 | #9,010 | 6 | #1,532 | 38 |
| 1978 | — | #1,352 | 46 | |
| 1977 | — | #1,245 | 51 | |
| 1976 | — | #1,111 | 58 | |
| 1975 | #7,984 | 6 | #1,114 | 57 |
| 1974 | — | #1,546 | 32 | |
| 1973 | — | #1,696 | 27 | |
| 1972 | — | #1,721 | 26 | |
| 1971 | — | #1,862 | 23 | |
| 1970 | #6,362 | 7 | #1,615 | 28 |
| 1969 | #7,471 | 5 | #1,492 | 29 |
| 1968 | — | #1,614 | 24 | |
| 1967 | — | #1,411 | 29 | |
| 1966 | #5,809 | 6 | #1,613 | 23 |
| 1965 | — | #1,144 | 43 | |
| 1964 | #3,692 | 13 | #1,236 | 39 |
| 1963 | #4,896 | 8 | #1,375 | 32 |
| 1962 | #3,782 | 12 | #1,546 | 26 |
| 1961 | #3,189 | 16 | #1,322 | 36 |
| 1960 | #5,168 | 7 | #1,210 | 42 |
| 1959 | #4,625 | 8 | #1,302 | 36 |
| 1958 | #3,747 | 11 | #1,305 | 35 |
| 1957 | #2,563 | 20 | #1,278 | 37 |
| 1956 | #3,696 | 11 | #1,218 | 39 |
| 1955 | #2,280 | 23 | #1,313 | 33 |
| 1954 | #2,779 | 16 | #1,382 | 30 |
| 1953 | #2,516 | 18 | #1,304 | 33 |
| 1952 | #2,502 | 18 | #1,152 | 41 |
| 1951 | #2,391 | 18 | #1,052 | 46 |
| 1950 | #1,679 | 31 | #1,105 | 41 |
| 1949 | #2,069 | 22 | #1,185 | 36 |
| 1948 | #1,621 | 33 | #1,023 | 47 |
| 1947 | #1,602 | 35 | #1,159 | 39 |
| 1946 | #1,583 | 31 | #1,045 | 43 |
| 1945 | #1,080 | 53 | #927 | 48 |
| 1944 | #1,578 | 27 | #974 | 44 |
| 1943 | #1,442 | 33 | #846 | 61 |
| 1942 | #1,630 | 26 | #991 | 45 |
| 1941 | #1,310 | 34 | #1,040 | 39 |
| 1940 | #1,313 | 32 | #1,050 | 38 |
| 1939 | #1,424 | 27 | #754 | 64 |
| 1938 | #1,805 | 19 | #764 | 64 |
| 1937 | #1,255 | 33 | #1,000 | 40 |
| 1936 | #1,321 | 30 | #690 | 73 |
| 1935 | #1,119 | 39 | #725 | 71 |
| 1934 | #1,133 | 39 | #845 | 55 |
| 1933 | #1,123 | 39 | #775 | 62 |
| 1932 | #1,116 | 41 | #708 | 76 |
| 1931 | #1,074 | 43 | #643 | 85 |
| 1930 | #993 | 55 | #645 | 90 |
| 1929 | #842 | 71 | #721 | 75 |
| 1928 | #947 | 62 | #652 | 92 |
| 1927 | #1,000 | 58 | #592 | 109 |
| 1926 | #763 | 90 | #614 | 104 |
| 1925 | #727 | 102 | #641 | 98 |
| 1924 | #705 | 111 | #653 | 97 |
| 1923 | #845 | 75 | #668 | 92 |
| 1922 | #720 | 102 | #617 | 109 |
| 1921 | #747 | 96 | #611 | 107 |
| 1920 | #729 | 98 | #640 | 97 |
| 1919 | #666 | 109 | #633 | 92 |
| 1918 | #702 | 105 | #664 | 87 |
| 1917 | #735 | 91 | #629 | 89 |
| 1916 | #692 | 98 | #593 | 96 |
| 1915 | #667 | 98 | #601 | 91 |
| 1914 | #720 | 64 | #546 | 81 |
| 1913 | #741 | 50 | #550 | 62 |
| 1912 | #689 | 53 | #568 | 50 |
| 1911 | #722 | 36 | #533 | 31 |
| 1910 | #794 | 29 | #461 | 35 |
| 1909 | #580 | 44 | #558 | 22 |
| 1908 | #791 | 24 | #403 | 34 |
| 1907 | #680 | 31 | #429 | 29 |
| 1906 | #707 | 27 | #568 | 17 |
| 1905 | #600 | 34 | #463 | 23 |
| 1904 | #612 | 31 | #401 | 27 |
| 1903 | #607 | 29 | #505 | 18 |
| 1902 | #545 | 35 | #415 | 24 |
| 1901 | #747 | 19 | #453 | 18 |
| 1900 | #780 | 22 | #680 | 14 |
| 1899 | #814 | 16 | #661 | 10 |
| 1898 | #650 | 25 | #523 | 16 |
| 1897 | #567 | 28 | #652 | 11 |
| 1896 | #635 | 24 | #641 | 12 |
| 1895 | #607 | 25 | #556 | 14 |
| 1894 | #719 | 17 | #594 | 12 |
| 1893 | #662 | 19 | #615 | 11 |
| 1892 | #554 | 25 | #748 | 9 |
| 1891 | #572 | 21 | #564 | 11 |
| 1890 | #791 | 12 | #566 | 12 |
| 1889 | #600 | 18 | #722 | 8 |
| 1888 | #612 | 17 | #704 | 9 |
| 1887 | #512 | 19 | #583 | 10 |
| 1886 | #572 | 15 | #694 | 8 |
| 1885 | #658 | 11 | #700 | 8 |
| 1884 | #520 | 16 | #764 | 7 |
| 1883 | #754 | 7 | #479 | 14 |
| 1882 | #596 | 10 | #540 | 12 |
| 1881 | #623 | 8 | #653 | 8 |
| 1880 | #679 | 7 | #640 | 9 |
In the first year the SSA published name data, Theo was already there! It came in at #640, and was given to 9 baby boys.
Quietest stretch: 1884–1889, when fewer than 11 boys a year got the name.
See more about Theo
- 2 spots since 2024 (#80 → #82)
- 90 spots since 2020 (#172 → #82)
- 323 spots since 2015 (#405 → #82)
- Biggest jump: 236 spots in 1938 (#1,000 → #764)
- Biggest drop: 310 spots in 1937 (#690 → #1,000)
- Debuted 1880
- Peaked 2023 at #78 (4,140 births)
- Not yet halved from its peak
- Top 10: never
- Top 100: 4 yrs · run 2022–2025
- Top 1,000: 80 yrs · run 1880–1939
- Highest: 1 in 413 boys born in 2023 were named Theo (0.24%)
- Latest: 1 in 433 boys born in 2025 (0.23%)
- 58.0% of all boys named Theo (20,784) were born in this decade
- Mostly girls until 1945, mostly boys since
Show by decade
| Decade | Births | Best rank | Avg rank |
|---|---|---|---|
| 1880s | 93 | #479 (1883) | #648 |
| 1890s | 118 | #523 (1898) | #612 |
| 1900s | 226 | #401 (1904) | #488 |
| 1910s | 714 | #461 (1910) | #578 |
| 1920s | 980 | #592 (1927) | #641 |
| 1930s | 680 | #643 (1931) | #755 |
| 1940s | 440 | #846 (1943) | #1,024 |
| 1950s | 371 | #1,052 (1951) | #1,241 |
| 1960s | 323 | #1,144 (1965) | #1,396 |
| 1970s | 386 | #1,111 (1976) | #1,479 |
| 1980s | 540 | #1,003 (1986) | #1,488 |
| 1990s | 600 | #1,370 (1990) | #1,584 |
| 2000s | 1,386 | #1,012 (2007) | #1,188 |
| 2010s | 8,189 | #195 (2019) | #523 |
| 2020s | 20,784 | #78 (2023) | #109 |
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.
Theo in 1904
Top girls' names in 1904
Top boys' names in 1904
More about 1904
girls
275,362 girls got a published name in 1904; 1 in 8,883 of them was named Theo, which outranked 71.7% of the 2,165 girls' names that year. The ten most popular names covered 20.0% of girls (24.6% in 1880, 7.0% in 2025).
boys
128,122 boys got a published name in 1904; 1 in 4,745 of them was named Theo, which outranked 71.3% of the 1,395 boys' names that year. The ten most popular names covered 32.7% of boys (44.2% in 1880, 8.0% in 2025).