The baby name Lonny appears in baby name data for the United States from 1938 to 1988. It was most popular in 1957 with 227 babies given the name.
In the later years of this period, Lonny has become less common than it once was.
| Year | Count |
|---|---|
| 1938 | 6 |
| 1939 | 11 |
| 1940 | 40 |
| 1941 | 5 |
| 1942 | 18 |
| 1943 | 13 |
| 1944 | 31 |
| 1945 | 54 |
| 1946 | 61 |
| 1947 | 133 |
| 1948 | 156 |
| 1949 | 80 |
| 1950 | 109 |
| 1951 | 100 |
| 1952 | 51 |
| 1953 | 89 |
| 1954 | 102 |
| 1955 | 160 |
| 1956 | 145 |
| 1957 | 227 |
| 1958 | 148 |
| 1959 | 189 |
| 1960 | 156 |
| 1961 | 141 |
| 1962 | 152 |
| 1963 | 172 |
| 1964 | 141 |
| 1965 | 111 |
| 1966 | 206 |
| 1967 | 135 |
| 1968 | 207 |
| 1969 | 142 |
| 1970 | 116 |
| 1971 | 77 |
| 1972 | 87 |
| 1973 | 59 |
| 1974 | 25 |
| 1975 | 48 |
| 1976 | 13 |
| 1977 | 25 |
| 1978 | 26 |
| 1979 | 24 |
| 1980 | 10 |
| 1982 | 5 |
| 1985 | 5 |
| 1988 | 5 |