Cynthea is a very rare variant of Cynthia that was most common in the 1950s and has all but disappeared.
Cynthea is a girl name. It last appears in U.S. records in 2006. Cynthea was first reported in SSA data in 1948 and peaked in 1958 (14 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2006 | 7 | 7 | #13,926 |
| 2002 | 6 | 6 | #13,997 |
| 1998 | 6 | 6 | #12,816 |
| 1994 | 7 | — | #10,824 |
| 1993 | 7 | — | #10,848 |
| 1992 | 13 | — | #6,727 |
| 1991 | 9 | — | #8,749 |
| 1990 | 7 | — | #10,461 |
| 1981 | 5 | — | #10,754 |
| 1977 | 7 | — | #7,712 |
| 1976 | 10 | — | #5,670 |
| 1975 | 8 | — | #6,620 |
| 1974 | 6 | — | #7,890 |
| 1973 | 6 | — | #7,610 |
| 1972 | 8 | — | #6,051 |
| 1971 | 6 | — | #7,566 |
| 1970 | 6 | — | #7,236 |
| 1968 | 9 | — | #4,846 |
| 1967 | 6 | — | #6,157 |
| 1966 | 9 | — | #4,555 |
| 1965 | 5 | — | #6,713 |
| 1964 | 11 | — | #4,139 |
| 1963 | 7 | — | #5,411 |
| 1959 | 13 | — | #3,471 |
| 1958 | 14 | — | #3,256 |
| 1957 | 10 | — | #3,978 |
| 1956 | 10 | — | #3,961 |
| 1955 | 9 | — | #4,126 |
| 1954 | 10 | — | #3,766 |
| 1953 | 13 | — | #3,146 |
| 1952 | 10 | — | #3,598 |
| 1951 | 7 | — | #4,458 |
| 1950 | 8 | — | #4,028 |
| 1949 | 6 | — | #4,783 |
| 1948 | 6 | — | #4,781 |