Nelwyn is a rare girls' name that was most common in the 1930s and has all but disappeared.
Nelwyn is a girl name. It last appears in U.S. records in 1975. Nelwyn was first reported in SSA data in 1913 and peaked in 1938 (22 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1975 | 6 | — | #8,699 |
| 1968 | 5 | — | #7,825 |
| 1962 | 6 | — | #6,351 |
| 1961 | 7 | — | #5,681 |
| 1960 | 6 | — | #6,184 |
| 1959 | 8 | — | #4,914 |
| 1958 | 6 | — | #5,911 |
| 1957 | 8 | — | #4,798 |
| 1956 | 14 | — | #3,282 |
| 1955 | 17 | — | #2,807 |
| 1954 | 6 | — | #5,565 |
| 1953 | 12 | — | #3,409 |
| 1952 | 7 | — | #4,801 |
| 1951 | 15 | — | #2,778 |
| 1950 | 14 | — | #2,866 |
| 1949 | 12 | — | #3,124 |
| 1948 | 15 | — | #2,671 |
| 1947 | 16 | — | #2,604 |
| 1946 | 9 | — | #3,593 |
| 1945 | 14 | — | #2,419 |
| 1944 | 16 | — | #2,262 |
| 1943 | 14 | — | #2,524 |
| 1942 | 20 | — | #1,959 |
| 1941 | 9 | — | #3,181 |
| 1940 | 16 | — | #2,075 |
| 1939 | 18 | — | #1,935 |
| 1938 | 22 | — | #1,686 |
| 1937 | 10 | — | #2,882 |
| 1936 | 19 | — | #1,782 |
| 1935 | 20 | — | #1,760 |
| 1934 | 21 | — | #1,684 |
| 1933 | 16 | — | #2,026 |
| 1932 | 11 | — | #2,785 |
| 1931 | 17 | — | #2,007 |
| 1930 | 20 | — | #1,853 |
| 1929 | 15 | — | #2,275 |
| 1928 | 17 | — | #2,165 |
| 1927 | 17 | — | #2,230 |
| 1926 | 18 | — | #2,133 |
| 1925 | 19 | — | #2,096 |
| 1924 | 14 | — | #2,632 |
| 1923 | 9 | — | #3,571 |
| 1922 | 7 | — | #4,322 |
| 1921 | 15 | — | #2,470 |
| 1920 | 18 | — | #2,143 |
| 1919 | 10 | — | #3,159 |
| 1918 | 13 | — | #2,634 |
| 1917 | 9 | — | #3,282 |
| 1916 | 6 | — | #4,269 |
| 1915 | 6 | — | #4,114 |
| 1914 | 7 | — | #3,094 |
| 1913 | 5 | — | #3,558 |