Sonji
Sonji was last recorded in 1991, when 6 babies were given it; 904 Americans have been recorded with it between 1951 and 1991 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Sonji by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Sonji?
Unranked in 2025
Its last girls’ rank on record is #12,921, in 1991; SSA lists a name only in years with 5 or more births.
225 babies in 1966, the peak
Sonji peaked in 1966, when 225 girls were given it, #639 among girls’ names. It was not recorded in 2025.
| Year | Births | Rank | Per 1,000 girls |
|---|---|---|---|
| 1991 | 6 | #12,921 | under 0.01 |
| 1988 | 5 | #13,596 | under 0.01 |
| 1986 | 5 | #12,562 | under 0.01 |
| 1983 | 6 | #10,096 | under 0.01 |
| 1981 | 5 | #11,935 | under 0.01 |
| 1980 | 8 | #8,062 | under 0.01 |
| 1979 | 7 | #8,880 | under 0.01 |
| 1978 | 8 | #7,550 | 0.01 |
| 1977 | 13 | #5,167 | 0.01 |
| 1976 | 12 | #5,152 | 0.01 |
Every recorded year (31)
| Year | Births | Rank | Per 1,000 girls |
|---|---|---|---|
| 1975 | 6 | #8,891 | under 0.01 |
| 1974 | 9 | #6,178 | 0.01 |
| 1973 | 26 | #2,738 | 0.02 |
| 1972 | 41 | #1,987 | 0.03 |
| 1971 | 50 | #1,794 | 0.03 |
| 1970 | 39 | #2,113 | 0.02 |
| 1969 | 75 | #1,314 | 0.04 |
| 1968 | 69 | #1,343 | 0.04 |
| 1967 | 98 | #1,044 | 0.06 |
| 1966 | 225 | #639 | 0.13 |
| 1965 | 96 | #1,074 | 0.05 |
| 1964 | 35 | #2,035 | 0.02 |
| 1963 | 8 | #5,231 | under 0.01 |
| 1962 | 8 | #5,237 | under 0.01 |
| 1961 | 7 | #5,763 | under 0.01 |
| 1960 | 8 | #5,119 | under 0.01 |
| 1958 | 5 | #6,902 | under 0.01 |
| 1955 | 5 | #6,601 | under 0.01 |
| 1954 | 5 | #6,513 | under 0.01 |
| 1953 | 8 | #4,550 | under 0.01 |
| 1951 | 6 | #5,340 | under 0.01 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Sonji a boy’s or a girl’s name?
Sonji has been recorded only for girls: SSA lists no boys with the name in 31 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Sonji: the SSA national file counts each sex separately.
How many people are named Sonji, and how old are they?
An estimated 815 Americans named Sonji and born in the U.S. are alive in 2026 (90% of everyone recorded); the median is 59 years old and half are between 56 and 60. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 808 people named Sonji (798 women and girls, 10 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 841 born in the U.S. The Census count is 4% below that prediction.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Of these 3 names spelled alike, given to 41,574 babies since 1880, Sonji is the third most given (2.2% of them). In 2025 none of their 37 babies recorded by SSA was a Sonji (SSA lists a name only with 5 or more babies of one sex).
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Sonji
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Sonji and names like it
- Compare Sonji and SonjaBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1960sSonji peaked in 1966.
- Illinois’s most given namesThe state where SSA recorded the most babies named Sonji since 1910.
- The top names of 1966The year the most babies were named Sonji.
- The names of Generation XMost people named Sonji alive today were born 1965-1980.
- Names starting with SMost given first.