Gwenlyn is a very rare girls' name that was most common in the 1940s and has all but disappeared.
Gwenlyn is a girl name. It last appears in U.S. records in 1964. Gwenlyn first appears in 1934 and peaked in 1943 (9 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1964 | 6 | — | #6,276 |
| 1962 | 5 | — | #6,928 |
| 1959 | 5 | — | #6,604 |
| 1957 | 7 | — | #5,080 |
| 1955 | 6 | — | #5,444 |
| 1954 | 9 | — | #4,081 |
| 1953 | 6 | — | #5,274 |
| 1951 | 6 | — | #5,067 |
| 1950 | 7 | — | #4,473 |
| 1949 | 9 | — | #3,723 |
| 1948 | 8 | — | #4,003 |
| 1947 | 9 | — | #3,833 |
| 1946 | 8 | — | #3,792 |
| 1943 | 9 | — | #3,339 |
| 1942 | 5 | — | #4,908 |
| 1941 | 7 | — | #3,725 |
| 1940 | 6 | — | #4,051 |
| 1939 | 8 | — | #3,253 |
| 1937 | 8 | — | #3,265 |
| 1934 | 6 | — | #4,003 |