Uno is a very rare variant of Una that was most common in the 1910s and has all but disappeared.
Uno is a boy name. It last appears in U.S. records in 1923. Uno first appears in 1908 and peaked in 1918 (15 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1923 | 7 | — | #3,796 |
| 1919 | 15 | — | #2,142 |
| 1918 | 15 | — | #2,155 |
| 1917 | 10 | — | #2,716 |
| 1916 | 6 | — | #3,855 |
| 1915 | 14 | — | #2,057 |
| 1914 | 11 | — | #2,092 |
| 1913 | 8 | — | #2,257 |
| 1912 | 12 | — | #1,519 |
| 1908 | 5 | — | #1,574 |