The baby name Elwyn appears in baby name data for the United States from 1912 to 1951. It was most popular in 1925 with 69 babies given the name.
In the later years of this period, Elwyn has become less common than it once was.
| Year | Count |
|---|---|
| 1912 | 5 |
| 1913 | 18 |
| 1914 | 12 |
| 1915 | 16 |
| 1916 | 12 |
| 1917 | 42 |
| 1918 | 43 |
| 1919 | 35 |
| 1920 | 52 |
| 1921 | 44 |
| 1922 | 49 |
| 1923 | 51 |
| 1924 | 45 |
| 1925 | 69 |
| 1926 | 48 |
| 1927 | 40 |
| 1928 | 14 |
| 1929 | 27 |
| 1930 | 39 |
| 1931 | 28 |
| 1932 | 51 |
| 1933 | 25 |
| 1934 | 25 |
| 1935 | 20 |
| 1936 | 5 |
| 1937 | 11 |
| 1939 | 12 |
| 1940 | 12 |
| 1942 | 21 |
| 1943 | 6 |
| 1945 | 5 |
| 1951 | 5 |