Unknown
#3,249 for girls in 2025, 48 births · #2,718 for boys in 2025, 47 births
Given to boys 50.2% of the time
- Peak · boys
- 1954 · 548 births
- Debut · boys
- 5 births
- In top 100 · boys
- neverof 146 years
- Total births · boys
- 9,888since 1880
Unknown 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 | #3,249 | 48 | #2,718 | 47 |
| 2024 | #3,892 | 38 | #2,915 | 43 |
| 2023 | #3,428 | 46 | #1,941 | 80 |
| 2022 | #3,123 | 52 | #1,861 | 85 |
| 2021 | #3,250 | 49 | #1,823 | 85 |
| 2020 | #3,546 | 42 | #2,235 | 61 |
| 2019 | #3,043 | 53 | #1,917 | 77 |
| 2018 | #2,610 | 66 | #1,792 | 85 |
| 2017 | #3,346 | 47 | #2,065 | 67 |
| 2016 | #3,996 | 37 | #2,518 | 50 |
| 2015 | #3,595 | 43 | #2,234 | 60 |
| 2014 | #2,497 | 72 | #1,857 | 79 |
| 2013 | #2,597 | 68 | #1,588 | 97 |
| 2012 | #2,734 | 64 | #1,588 | 99 |
| 2011 | #2,395 | 77 | #1,703 | 87 |
| 2010 | #2,726 | 65 | #1,713 | 89 |
| 2009 | #2,316 | 84 | #1,459 | 114 |
| 2008 | #2,855 | 62 | #1,948 | 73 |
| 2007 | #4,675 | 31 | #2,811 | 42 |
| 2006 | #7,482 | 16 | #3,888 | 25 |
| 2005 | #5,113 | 25 | #3,941 | 23 |
| 2004 | #5,969 | 20 | #3,735 | 24 |
| 2003 | #4,307 | 30 | #3,044 | 31 |
| 2002 | #6,129 | 18 | #3,259 | 27 |
| 2001 | #4,321 | 28 | #4,890 | 15 |
| 2000 | #3,216 | 42 | #2,425 | 39 |
| 1999 | #4,313 | 26 | #4,341 | 16 |
| 1998 | #5,583 | 18 | #4,413 | 15 |
| 1997 | #5,868 | 16 | #2,396 | 34 |
| 1996 | #2,423 | 53 | #1,740 | 53 |
| 1995 | #865 | 223 | #665 | 248 |
| 1994 | #1,115 | 161 | #835 | 163 |
| 1993 | #1,611 | 94 | #983 | 121 |
| 1992 | #1,264 | 135 | #850 | 155 |
| 1991 | #794 | 258 | #588 | 299 |
| 1990 | #1,088 | 162 | #738 | 192 |
| 1989 | #773 | 251 | #609 | 262 |
| 1988 | #1,822 | 68 | #1,003 | 94 |
| 1987 | #4,474 | 18 | #3,201 | 15 |
| 1986 | #7,749 | 8 | #4,457 | 9 |
| 1985 | — | #3,805 | 11 | |
| 1984 | #8,153 | 7 | #6,315 | 5 |
| 1983 | #5,457 | 12 | #4,499 | 8 |
| 1982 | #4,527 | 16 | #3,482 | 12 |
| 1981 | #5,885 | 11 | #2,569 | 18 |
| 1980 | #8,178 | 7 | #4,134 | 9 |
| 1979 | #6,189 | 10 | #3,357 | 12 |
| 1978 | #6,385 | 9 | #3,614 | 10 |
| 1977 | #5,213 | 12 | #3,037 | 13 |
| 1976 | #3,812 | 17 | #2,946 | 13 |
| 1975 | #3,259 | 21 | #2,361 | 18 |
| 1974 | #6,258 | 8 | #2,129 | 20 |
| 1973 | #2,914 | 23 | #2,036 | 20 |
| 1972 | #4,091 | 14 | #2,418 | 15 |
| 1971 | #3,508 | 18 | #1,494 | 33 |
| 1970 | #3,435 | 18 | #1,278 | 42 |
| 1969 | #2,768 | 23 | #1,526 | 28 |
| 1968 | #2,969 | 19 | #1,393 | 31 |
| 1967 | #2,963 | 18 | #1,165 | 41 |
| 1966 | #1,982 | 34 | #1,178 | 40 |
| 1965 | #2,204 | 29 | #1,294 | 35 |
| 1964 | #1,747 | 44 | #1,082 | 49 |
| 1963 | #1,522 | 54 | #886 | 71 |
| 1962 | #1,476 | 57 | #746 | 105 |
| 1961 | #1,122 | 96 | #610 | 168 |
| 1960 | #920 | 133 | #563 | 194 |
| 1959 | #848 | 145 | #568 | 188 |
| 1958 | #684 | 209 | #479 | 269 |
| 1957 | #533 | 323 | #386 | 391 |
| 1956 | #384 | 540 | #346 | 457 |
| 1955 | #368 | 564 | #332 | 497 |
| 1954 | #336 | 644 | #308 | 548 |
| 1953 | #338 | 600 | #313 | 525 |
| 1952 | #330 | 622 | #320 | 488 |
| 1951 | #333 | 565 | #328 | 439 |
| 1950 | #347 | 511 | #335 | 404 |
| 1949 | #373 | 443 | #402 | 278 |
| 1948 | #468 | 294 | #516 | 163 |
| 1947 | #691 | 148 | #696 | 99 |
| 1946 | #809 | 104 | #1,045 | 43 |
| 1945 | #1,060 | 54 | #986 | 42 |
| 1944 | #1,005 | 60 | #1,282 | 27 |
| 1943 | #1,070 | 56 | #1,258 | 30 |
| 1942 | #1,533 | 29 | #1,946 | 14 |
| 1941 | #2,018 | 17 | #2,491 | 9 |
| 1940 | #1,845 | 19 | #3,130 | 6 |
| 1939 | #2,417 | 12 | #2,829 | 7 |
| 1938 | #2,730 | 10 | #3,534 | 5 |
| 1937 | #2,317 | 13 | #3,175 | 6 |
| 1936 | #2,689 | 10 | — | |
| 1935 | #2,439 | 12 | #3,252 | 6 |
| 1934 | #2,923 | 9 | #2,973 | 7 |
| 1933 | #3,406 | 7 | #3,268 | 6 |
| 1932 | #2,235 | 14 | #2,849 | 8 |
| 1931 | #2,307 | 13 | #3,390 | 6 |
| 1930 | #2,845 | 10 | #2,178 | 13 |
| 1929 | #2,921 | 10 | #2,589 | 10 |
| 1928 | #2,623 | 12 | #2,659 | 10 |
| 1927 | #2,859 | 11 | #3,451 | 7 |
| 1926 | #3,873 | 7 | #2,302 | 13 |
| 1925 | #4,426 | 6 | #1,628 | 22 |
| 1924 | #3,144 | 10 | #3,505 | 7 |
| 1923 | #4,967 | 5 | #1,551 | 24 |
| 1922 | #2,479 | 14 | #1,883 | 18 |
| 1921 | #2,762 | 12 | #1,766 | 20 |
| 1920 | #3,340 | 9 | #1,885 | 18 |
| 1919 | #2,515 | 13 | #1,351 | 28 |
| 1918 | #1,887 | 20 | #1,256 | 31 |
| 1917 | #1,847 | 19 | #1,528 | 22 |
| 1916 | #2,368 | 13 | #1,415 | 24 |
| 1915 | #1,738 | 19 | #1,372 | 24 |
| 1914 | #2,125 | 11 | #1,441 | 18 |
| 1913 | #1,883 | 11 | #1,256 | 17 |
| 1912 | #1,620 | 12 | #1,223 | 15 |
| 1911 | #2,463 | 5 | #732 | 19 |
| 1910 | — | #859 | 13 | |
| 1909 | — | #1,277 | 6 | |
| 1908 | #2,101 | 5 | #1,021 | 8 |
| 1907 | #1,512 | 8 | #778 | 12 |
| 1906 | — | #852 | 9 | |
| 1905 | #1,162 | 11 | #836 | 9 |
| 1904 | #1,170 | 10 | #966 | 7 |
| 1903 | #1,592 | 6 | #1,009 | 6 |
| 1902 | #1,438 | 7 | #536 | 16 |
| 1901 | #1,466 | 6 | #727 | 9 |
| 1900 | #970 | 15 | #623 | 16 |
| 1899 | #1,034 | 10 | #786 | 8 |
| 1898 | #1,379 | 7 | #543 | 15 |
| 1897 | #1,263 | 7 | #725 | 9 |
| 1896 | #1,416 | 6 | #778 | 9 |
| 1895 | — | #738 | 9 | |
| 1894 | #1,136 | 8 | #594 | 12 |
| 1893 | — | #836 | 7 | |
| 1892 | — | #547 | 14 | |
| 1891 | — | #635 | 9 | |
| 1890 | #1,099 | 7 | #994 | 5 |
| 1889 | #950 | 8 | #878 | 6 |
| 1888 | — | #917 | 6 | |
| 1887 | — | #921 | 5 | |
| 1886 | #1,108 | 5 | — | |
| 1885 | — | #765 | 7 | |
| 1884 | — | — | ||
| 1883 | — | #720 | 7 | |
| 1882 | — | #754 | 7 | |
| 1881 | — | #653 | 8 | |
| 1880 | — | #909 | 5 | |
In the first year the SSA published name data, Unknown was already there! It came in at #909, and was given to 5 baby boys.
Quietest stretch: 1884, when fewer than 5 boys a year got the name.
See more about Unknown
- 197 spots since 2024 (#2,915 → #2,718)
- 483 spots since 2020 (#2,235 → #2,718)
- 484 spots since 2015 (#2,234 → #2,718)
- Biggest jump: 418 spots in 1910 (#1,277 → #859)
- Biggest drop: 1,075 spots in 1996 (#665 → #1,740)
- Debuted 1880
- Peaked 1954 at #308 (548 births)
- Births halved by 1958, 4 yrs later
- Top 10: never
- Top 100: never
- Top 1,000: 52 yrs · run 1947–1963
- Highest: 1 in 3,720 boys born in 1954 were named Unknown (0.03%)
- Latest: 1 in 36,342 boys born in 2025 (0.00%)
- 42.5% of all boys named Unknown (4,206) were born in this decade
- Mostly boys until 2024, mostly girls since
Show by decade
| Decade | Births | Best rank | Avg rank |
|---|---|---|---|
| 1880s | 51 | #653 (1881) | #815 |
| 1890s | 97 | #543 (1898) | #718 |
| 1900s | 98 | #536 (1902) | #863 |
| 1910s | 211 | #732 (1911) | #1,243 |
| 1920s | 149 | #1,551 (1923) | #2,322 |
| 1930s | 64 | #2,178 (1930) | #3,050 |
| 1940s | 711 | #402 (1949) | #1,375 |
| 1950s | 4,206 | #308 (1954) | #372 |
| 1960s | 762 | #563 (1960) | #1,044 |
| 1970s | 196 | #1,278 (1970) | #2,467 |
| 1980s | 443 | #609 (1989) | #3,407 |
| 1990s | 1,296 | #588 (1991) | #1,755 |
| 2000s | 413 | #1,459 (2009) | #3,140 |
| 2010s | 790 | #1,588 (2012) | #1,898 |
| 2020s | 401 | #1,823 (2021) | #2,249 |
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.
Unknown in 1955
Top girls' names in 1955
Top boys' names in 1955
More about 1955
girls
1,955,277 girls got a published name in 1955; 1 in 3,467 of them was named Unknown, which outranked 94.5% of the 6,732 girls' names that year. The ten most popular names covered 22.3% of girls (24.6% in 1880, 7.0% in 2025).
Among names in the top 1,000 of either year.
boys
2,059,889 boys got a published name in 1955; 1 in 4,145 of them was named Unknown, which outranked 92.5% of the 4,400 boys' names that year. The ten most popular names covered 32.1% of boys (44.2% in 1880, 8.0% in 2025).
Among names in the top 1,000 of either year.