Lonn is a rare variant of Lonnie that was most common in the 1960s and has all but disappeared.
Lonn is a boy name. It last appears in U.S. records in 1980. Lonn was first reported in SSA data in 1940 and peaked in 1968 (19 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1980 | 9 | — | #4,365 |
| 1978 | 7 | — | #4,847 |
| 1977 | 5 | — | #6,442 |
| 1976 | 8 | — | #4,251 |
| 1975 | 12 | — | #3,170 |
| 1974 | 10 | — | #3,470 |
| 1973 | 8 | — | #3,924 |
| 1972 | 14 | — | #2,612 |
| 1971 | 11 | — | #3,082 |
| 1970 | 15 | — | #2,461 |
| 1969 | 11 | — | #2,792 |
| 1968 | 19 | — | #1,875 |
| 1967 | 9 | — | #2,898 |
| 1966 | 16 | — | #2,015 |
| 1965 | 14 | — | #2,229 |
| 1964 | 11 | — | #2,613 |
| 1963 | 16 | — | #2,087 |
| 1962 | 7 | — | #3,513 |
| 1961 | 15 | — | #2,198 |
| 1960 | 16 | — | #2,092 |
| 1959 | 15 | — | #2,167 |
| 1958 | 13 | — | #2,323 |
| 1957 | 14 | — | #2,244 |
| 1956 | 15 | — | #2,138 |
| 1955 | 13 | — | #2,272 |
| 1954 | 9 | — | #2,870 |
| 1953 | 15 | — | #2,076 |
| 1951 | 6 | — | #3,578 |
| 1950 | 11 | — | #2,385 |
| 1949 | 13 | — | #2,184 |
| 1948 | 12 | — | #2,283 |
| 1947 | 10 | — | #2,596 |
| 1946 | 7 | — | #3,072 |
| 1940 | 5 | — | #3,743 |