Monaca is a very rare variant of Monica that was most common in the 1970s and has all but disappeared.
Monaca is a girl name. It last appears in U.S. records in 1981. Monaca first appears in 1968 and peaked in 1976 (10 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1981 | 6 | — | #9,926 |
| 1980 | 5 | — | #11,529 |
| 1979 | 10 | — | #6,526 |
| 1978 | 6 | — | #9,316 |
| 1977 | 9 | — | #6,681 |
| 1976 | 10 | — | #5,882 |
| 1975 | 8 | — | #6,907 |
| 1974 | 7 | — | #7,406 |
| 1973 | 9 | — | #5,889 |
| 1970 | 7 | — | #6,814 |
| 1969 | 5 | — | #8,257 |
| 1968 | 5 | — | #7,796 |