Theo*
#580 most common boys' name of all time · #1,278 across all names · 91% male / 9% female · used 1880–2025 · notable crossover
Rank among boys
#580
Rank overall
#1,278 of 105,966
First appeared
1880 or earlier
Years on the list
146 of 146
All-time
39,333
Since 2016
26,848
Peak year
2023 #78
Best rank
#78 2023
Girls
Boys
peak 4,182/yr
Theo is in the records from the very first year available, so it was almost certainly in use before 1880 — the data simply doesn't go back further.
Year by year
| Year | Girls | Boys | Total | Rank |
|---|---|---|---|---|
| 2025 | 21 | 3,945 | 3,966 | #82 |
| 2024 | 31 | 4,129 | 4,160 | #80 |
| 2023 | 42 | 4,140 | 4,182 | #78 |
| 2022 | 50 | 3,642 | 3,692 | #98 |
| 2021 | 64 | 2,703 | 2,767 | #142 |
| 2020 | 44 | 2,225 | 2,269 | #172 |
| 2019 | 31 | 2,018 | 2,049 | #195 |
| 2018 | 7 | 1,554 | 1,561 | #243 |
| 2017 | 7 | 1,232 | 1,239 | #290 |
| 2016 | 11 | 952 | 963 | #354 |
| 2015 | — | 765 | 765 | #405 |
| 2014 | — | 550 | 550 | #509 |
| 2013 | — | 365 | 365 | #663 |
| 2012 | — | 287 | 287 | #790 |
| 2011 | — | 245 | 245 | #863 |
| 2010 | — | 221 | 221 | #914 |
| 2009 | — | 187 | 187 | #1,032 |
| 2008 | — | 188 | 188 | #1,019 |
| 2007 | — | 191 | 191 | #1,012 |
| 2006 | — | 156 | 156 | #1,117 |
| 2005 | — | 139 | 139 | #1,150 |
| 2004 | — | 133 | 133 | #1,172 |
| 2003 | — | 109 | 109 | #1,291 |
| 2002 | 5 | 98 | 103 | #1,346 |
| 2001 | — | 84 | 84 | #1,460 |
| 2000 | — | 101 | 101 | #1,283 |
| 1999 | — | 76 | 76 | #1,490 |
| 1998 | — | 63 | 63 | #1,642 |
| 1997 | — | 62 | 62 | #1,628 |
| 1996 | — | 53 | 53 | #1,740 |
| 1995 | — | 56 | 56 | #1,623 |
| 1994 | — | 54 | 54 | #1,664 |
| 1993 | — | 50 | 50 | #1,721 |
| 1992 | — | 59 | 59 | #1,511 |
| 1991 | 5 | 61 | 66 | #1,452 |
| 1990 | — | 66 | 66 | #1,370 |
| 1989 | — | 77 | 77 | #1,220 |
| 1988 | — | 77 | 77 | #1,145 |
| 1987 | — | 75 | 75 | #1,106 |
| 1986 | — | 85 | 85 | #1,003 |
| 1985 | — | 76 | 76 | #1,057 |
| 1984 | — | 23 | 23 | #2,234 |
| 1983 | — | 27 | 27 | #1,956 |
| 1982 | — | 33 | 33 | #1,735 |
| 1981 | — | 31 | 31 | #1,813 |
| 1980 | — | 36 | 36 | #1,620 |
| 1979 | 6 | 38 | 44 | #1,533 |
| 1978 | — | 46 | 46 | #1,352 |
| 1977 | — | 51 | 51 | #1,245 |
| 1976 | — | 58 | 58 | #1,112 |
| 1975 | 6 | 57 | 63 | #1,114 |
| 1974 | — | 32 | 32 | #1,547 |
| 1973 | — | 27 | 27 | #1,696 |
| 1972 | — | 26 | 26 | #1,722 |
| 1971 | — | 23 | 23 | #1,863 |
| 1970 | 7 | 28 | 35 | #1,616 |
| 1969 | 5 | 29 | 34 | #1,494 |
| 1968 | — | 24 | 24 | #1,614 |
| 1967 | — | 29 | 29 | #1,412 |
| 1966 | 6 | 23 | 29 | #1,615 |
| 1965 | — | 43 | 43 | #1,146 |
| 1964 | 13 | 39 | 52 | #1,236 |
| 1963 | 8 | 32 | 40 | #1,377 |
| 1962 | 12 | 26 | 38 | #1,547 |
| 1961 | 16 | 36 | 52 | #1,322 |
| 1960 | 7 | 42 | 49 | #1,211 |
| 1959 | 8 | 36 | 44 | #1,303 |
| 1958 | 11 | 35 | 46 | #1,306 |
| 1957 | 20 | 37 | 57 | #1,279 |
| 1956 | 11 | 39 | 50 | #1,218 |
| 1955 | 23 | 33 | 56 | #1,314 |
| 1954 | 16 | 30 | 46 | #1,384 |
| 1953 | 18 | 33 | 51 | #1,305 |
| 1952 | 18 | 41 | 59 | #1,154 |
| 1951 | 18 | 46 | 64 | #1,053 |
| 1950 | 31 | 41 | 72 | #1,105 |
| 1949 | 22 | 36 | 58 | #1,185 |
| 1948 | 33 | 47 | 80 | #1,024 |
| 1947 | 35 | 39 | 74 | #1,159 |
| 1946 | 31 | 43 | 74 | #1,045 |
| 1945 | 53 | 48 | 101 | #929 |
| 1944 | 27 | 44 | 71 | #974 |
| 1943 | 33 | 61 | 94 | #848 |
| 1942 | 26 | 45 | 71 | #992 |
| 1941 | 34 | 39 | 73 | #1,044 |
| 1940 | 32 | 38 | 70 | #1,051 |
| 1939 | 27 | 64 | 91 | #754 |
| 1938 | 19 | 64 | 83 | #764 |
| 1937 | 33 | 40 | 73 | #1,002 |
| 1936 | 30 | 73 | 103 | #690 |
| 1935 | 39 | 71 | 110 | #726 |
| 1934 | 39 | 55 | 94 | #845 |
| 1933 | 39 | 62 | 101 | #775 |
| 1932 | 41 | 76 | 117 | #710 |
| 1931 | 43 | 85 | 128 | #643 |
| 1930 | 55 | 90 | 145 | #645 |
| 1929 | 71 | 75 | 146 | #721 |
| 1928 | 62 | 92 | 154 | #652 |
| 1927 | 58 | 109 | 167 | #593 |
| 1926 | 90 | 104 | 194 | #614 |
| 1925 | 102 | 98 | 200 | #641 |
| 1924 | 111 | 97 | 208 | #653 |
| 1923 | 75 | 92 | 167 | #669 |
| 1922 | 102 | 109 | 211 | #617 |
| 1921 | 96 | 107 | 203 | #611 |
| 1920 | 98 | 97 | 195 | #640 |
| 1919 | 109 | 92 | 201 | #633 |
| 1918 | 105 | 87 | 192 | #664 |
| 1917 | 91 | 89 | 180 | #629 |
| 1916 | 98 | 96 | 194 | #593 |
| 1915 | 98 | 91 | 189 | #602 |
| 1914 | 64 | 81 | 145 | #546 |
| 1913 | 50 | 62 | 112 | #550 |
| 1912 | 53 | 50 | 103 | #568 |
| 1911 | 36 | 31 | 67 | #534 |
| 1910 | 29 | 35 | 64 | #462 |
| 1909 | 44 | 22 | 66 | #560 |
| 1908 | 24 | 34 | 58 | #403 |
| 1907 | 31 | 29 | 60 | #429 |
| 1906 | 27 | 17 | 44 | #568 |
| 1905 | 34 | 23 | 57 | #465 |
| 1904 | 31 | 27 | 58 | #401 |
| 1903 | 29 | 18 | 47 | #508 |
| 1902 | 35 | 24 | 59 | #415 |
| 1901 | 19 | 18 | 37 | #455 |
| 1900 | 22 | 14 | 36 | #681 |
| 1899 | 16 | 10 | 26 | #668 |
| 1898 | 25 | 16 | 41 | #524 |
| 1897 | 28 | 11 | 39 | #655 |
| 1896 | 24 | 12 | 36 | #646 |
| 1895 | 25 | 14 | 39 | #556 |
| 1894 | 17 | 12 | 29 | #596 |
| 1893 | 19 | 11 | 30 | #621 |
| 1892 | 25 | 9 | 34 | #753 |
| 1891 | 21 | 11 | 32 | #568 |
| 1890 | 12 | 12 | 24 | #571 |
| 1889 | 18 | 8 | 26 | #732 |
| 1888 | 17 | 9 | 26 | #709 |
| 1887 | 19 | 10 | 29 | #590 |
| 1886 | 15 | 8 | 23 | #705 |
| 1885 | 11 | 8 | 19 | #706 |
| 1884 | 16 | 7 | 23 | #773 |
| 1883 | 7 | 14 | 21 | #480 |
| 1882 | 10 | 12 | 22 | #545 |
| 1881 | 8 | 8 | 16 | #658 |
| 1880 | 7 | 9 | 16 | #643 |