Elfa is a very rare variant of Elva that was most common in the 1910s and has all but disappeared.
Elfa is a girl name. It last appears in U.S. records in 1954. Elfa first appears in 1892 and peaked in 1915 (7 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1954 | 5 | — | #5,977 |
| 1927 | 7 | — | #3,972 |
| 1925 | 5 | — | #5,185 |
| 1922 | 7 | — | #4,132 |
| 1920 | 5 | — | #5,193 |
| 1918 | 5 | — | #5,035 |
| 1915 | 7 | — | #3,532 |
| 1914 | 6 | — | #3,304 |
| 1913 | 6 | — | #2,925 |
| 1912 | 5 | — | #3,103 |
| 1906 | 6 | — | #1,796 |
| 1900 | 6 | — | #1,785 |
| 1892 | 6 | — | #1,326 |