Koni is a very rare variant of Koen that was most common in the 1960s and has all but disappeared.
Koni is a girl name. It last appears in U.S. records in 1986. Koni was first reported in SSA data in 1952 and peaked in 1964 (28 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1986 | 5 | — | #11,838 |
| 1980 | 5 | — | #11,227 |
| 1979 | 6 | — | #9,551 |
| 1977 | 6 | — | #9,008 |
| 1972 | 7 | — | #6,889 |
| 1971 | 10 | — | #5,304 |
| 1970 | 13 | — | #4,369 |
| 1969 | 7 | — | #6,268 |
| 1968 | 8 | — | #5,379 |
| 1967 | 16 | — | #3,264 |
| 1966 | 16 | — | #3,204 |
| 1965 | 16 | — | #3,201 |
| 1964 | 28 | — | #2,327 |
| 1963 | 21 | — | #2,737 |
| 1962 | 26 | — | #2,386 |
| 1961 | 19 | — | #2,896 |
| 1960 | 13 | — | #3,584 |
| 1959 | 7 | — | #5,300 |
| 1958 | 8 | — | #4,708 |
| 1957 | 11 | — | #3,807 |
| 1956 | 6 | — | #5,619 |
| 1955 | 11 | — | #3,675 |
| 1954 | 6 | — | #5,453 |
| 1953 | 5 | — | #6,102 |
| 1952 | 6 | — | #5,211 |