Morio is a very rare boys' name that was most common in the 1980s and has all but disappeared.
Morio is a boy name. It last appears in U.S. records in 1987. Morio first appears in 1914 and peaked in 1985 (9 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1987 | 5 | — | #7,762 |
| 1985 | 9 | — | #4,573 |
| 1983 | 7 | — | #5,295 |
| 1981 | 6 | — | #6,005 |
| 1980 | 5 | — | #6,944 |
| 1979 | 7 | — | #5,185 |
| 1978 | 5 | — | #6,459 |
| 1975 | 6 | — | #5,247 |
| 1971 | 5 | — | #5,413 |
| 1926 | 5 | — | #4,617 |
| 1924 | 8 | — | #3,419 |
| 1923 | 5 | — | #4,682 |
| 1922 | 6 | — | #4,163 |
| 1921 | 5 | — | #4,772 |
| 1919 | 6 | — | #4,035 |
| 1917 | 5 | — | #4,382 |
| 1914 | 5 | — | #3,594 |