Dois is a very rare name used for both girls and boys that was most common in the 1920s and has all but disappeared.
Dois is predominantly a boy name. It last appears in U.S. records in 1950. Dois first appears in 1920 and peaked in 1923 (9 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 1950 | 5 | — | #5,490 | — |
| 1949 | 5 | — | — | #3,822 |
| 1942 | 5 | — | — | #3,697 |
| 1941 | 5 | — | — | #3,630 |
| 1940 | 5 | — | #4,509 | — |
| 1937 | 9 | — | — | #2,537 |
| 1934 | 14 | — | #2,976 | #3,809 |
| 1932 | 14 | — | #4,014 | #2,907 |
| 1931 | 10 | — | #4,480 | #3,912 |
| 1930 | 13 | — | #3,421 | #4,139 |
| 1929 | 16 | — | #3,201 | #3,312 |
| 1928 | 14 | — | #3,853 | #3,444 |
| 1927 | 5 | — | #4,987 | — |
| 1926 | 8 | — | — | #3,204 |
| 1924 | 7 | — | — | #3,583 |
| 1923 | 9 | — | — | #3,007 |
| 1922 | 6 | — | — | #3,964 |
| 1920 | 5 | — | — | #4,463 |