Jacolyn is a rare variant of Jaclyn that was most common in the 1950s and has all but disappeared.
Jacolyn is a girl name. It last appears in U.S. records in 1999. Jacolyn was first reported in SSA data in 1931 and peaked in 1953 (20 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1999 | 5 | 5 | #15,326 |
| 1994 | 5 | — | #14,256 |
| 1992 | 6 | — | #12,334 |
| 1990 | 5 | — | #13,813 |
| 1989 | 7 | — | #10,111 |
| 1988 | 5 | — | #12,503 |
| 1987 | 8 | — | #8,276 |
| 1983 | 6 | — | #9,466 |
| 1982 | 7 | — | #8,565 |
| 1980 | 8 | — | #7,659 |
| 1970 | 5 | — | #8,469 |
| 1968 | 7 | — | #5,860 |
| 1967 | 5 | — | #7,174 |
| 1963 | 6 | — | #6,144 |
| 1962 | 9 | — | #4,671 |
| 1961 | 9 | — | #4,671 |
| 1960 | 6 | — | #5,963 |
| 1959 | 9 | — | #4,432 |
| 1958 | 9 | — | #4,302 |
| 1957 | 9 | — | #4,351 |
| 1956 | 14 | — | #3,237 |
| 1955 | 14 | — | #3,146 |
| 1954 | 15 | — | #2,939 |
| 1953 | 20 | — | #2,389 |
| 1952 | 19 | — | #2,447 |
| 1951 | 19 | — | #2,345 |
| 1950 | 18 | — | #2,382 |
| 1949 | 12 | — | #3,067 |
| 1948 | 15 | — | #2,641 |
| 1947 | 7 | — | #4,520 |
| 1946 | 15 | — | #2,531 |
| 1945 | 5 | — | #4,856 |
| 1943 | 11 | — | #2,934 |
| 1942 | 5 | — | #4,932 |
| 1941 | 6 | — | #4,165 |
| 1938 | 5 | — | #4,605 |
| 1937 | 10 | — | #2,829 |
| 1936 | 8 | — | #3,238 |
| 1935 | 9 | — | #3,029 |
| 1933 | 5 | — | #4,509 |
| 1932 | 5 | — | #4,705 |
| 1931 | 7 | — | #3,662 |