Octa is a very rare girls' name that was most common in the 1910s and has all but disappeared.
Octa is a girl name. It last appears in U.S. records in 1941. Octa was first reported in SSA data in 1885 and peaked in 1915 (14 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1941 | 6 | — | #4,304 |
| 1926 | 5 | — | #5,425 |
| 1925 | 6 | — | #4,821 |
| 1922 | 8 | — | #3,919 |
| 1921 | 5 | — | #5,675 |
| 1920 | 10 | — | #3,285 |
| 1919 | 11 | — | #2,953 |
| 1918 | 7 | — | #4,174 |
| 1916 | 6 | — | #4,280 |
| 1915 | 14 | — | #2,224 |
| 1914 | 6 | — | #3,502 |
| 1913 | 6 | — | #3,094 |
| 1908 | 5 | — | #2,348 |
| 1907 | 6 | — | #1,991 |
| 1904 | 7 | — | #1,613 |
| 1901 | 10 | — | #1,115 |
| 1898 | 7 | — | #1,468 |
| 1897 | 5 | — | #1,724 |
| 1896 | 10 | — | #1,101 |
| 1889 | 6 | — | #1,235 |
| 1886 | 6 | — | #1,073 |
| 1885 | 8 | — | #833 |