Effa is a rare variant of Effie that was most common in the 1880s and has all but disappeared.
Effa is a girl name. It last appears in U.S. records in 1944. Effa was first reported in SSA data in 1880 and peaked in 1889 (20 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1944 | 7 | — | #3,799 |
| 1942 | 5 | — | #4,822 |
| 1927 | 5 | — | #5,010 |
| 1926 | 7 | — | #3,984 |
| 1925 | 7 | — | #4,132 |
| 1924 | 10 | — | #3,202 |
| 1922 | 5 | — | #5,214 |
| 1921 | 6 | — | #4,627 |
| 1920 | 6 | — | #4,538 |
| 1919 | 6 | — | #4,403 |
| 1918 | 6 | — | #4,430 |
| 1917 | 9 | — | #3,161 |
| 1916 | 7 | — | #3,647 |
| 1915 | 6 | — | #3,913 |
| 1914 | 8 | — | #2,713 |
| 1908 | 10 | — | #1,377 |
| 1903 | 5 | — | #1,870 |
| 1902 | 5 | — | #1,866 |
| 1900 | 6 | — | #1,781 |
| 1899 | 6 | — | #1,457 |
| 1898 | 8 | — | #1,286 |
| 1896 | 6 | — | #1,462 |
| 1895 | 5 | — | #1,663 |
| 1894 | 8 | — | #1,164 |
| 1893 | 7 | — | #1,208 |
| 1892 | 13 | — | #836 |
| 1891 | 14 | — | #731 |
| 1890 | 12 | — | #799 |
| 1889 | 20 | — | #577 |
| 1888 | 16 | — | #648 |
| 1886 | 7 | — | #921 |
| 1885 | 14 | — | #583 |
| 1884 | 14 | — | #563 |
| 1883 | 11 | — | #594 |
| 1882 | 7 | — | #762 |
| 1881 | 7 | — | #701 |
| 1880 | 11 | — | #524 |