Iantha is a rare girls' name that was most common in the 1910s and has all but disappeared.
Iantha is a girl name. It last appears in U.S. records in 1983. Iantha was first reported in SSA data in 1906 and peaked in 1915 (16 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1983 | 5 | — | #10,858 |
| 1981 | 6 | — | #9,508 |
| 1979 | 7 | — | #8,345 |
| 1978 | 5 | — | #10,315 |
| 1973 | 7 | — | #6,916 |
| 1970 | 5 | — | #8,449 |
| 1968 | 7 | — | #5,850 |
| 1962 | 9 | — | #4,665 |
| 1960 | 9 | — | #4,579 |
| 1959 | 8 | — | #4,777 |
| 1958 | 10 | — | #4,042 |
| 1957 | 5 | — | #6,448 |
| 1956 | 15 | — | #3,107 |
| 1955 | 6 | — | #5,451 |
| 1954 | 14 | — | #3,071 |
| 1952 | 5 | — | #5,889 |
| 1951 | 9 | — | #3,821 |
| 1950 | 8 | — | #4,097 |
| 1949 | 8 | — | #4,025 |
| 1948 | 6 | — | #4,886 |
| 1947 | 14 | — | #2,815 |
| 1946 | 10 | — | #3,312 |
| 1945 | 12 | — | #2,654 |
| 1944 | 7 | — | #3,854 |
| 1942 | 6 | — | #4,319 |
| 1941 | 12 | — | #2,588 |
| 1939 | 8 | — | #3,260 |
| 1938 | 5 | — | #4,592 |
| 1937 | 7 | — | #3,585 |
| 1934 | 13 | — | #2,349 |
| 1933 | 5 | — | #4,492 |
| 1932 | 8 | — | #3,411 |
| 1931 | 9 | — | #3,078 |
| 1930 | 8 | — | #3,483 |
| 1929 | 10 | — | #3,023 |
| 1928 | 9 | — | #3,302 |
| 1927 | 12 | — | #2,775 |
| 1926 | 10 | — | #3,148 |
| 1925 | 16 | — | #2,326 |
| 1924 | 14 | — | #2,593 |
| 1923 | 12 | — | #2,806 |
| 1922 | 14 | — | #2,544 |
| 1921 | 14 | — | #2,557 |
| 1920 | 13 | — | #2,654 |
| 1919 | 13 | — | #2,572 |
| 1918 | 12 | — | #2,740 |
| 1917 | 11 | — | #2,775 |
| 1916 | 9 | — | #3,135 |
| 1915 | 16 | — | #1,997 |
| 1914 | 11 | — | #2,185 |
| 1912 | 6 | — | #2,778 |
| 1911 | 6 | — | #2,316 |
| 1910 | 6 | — | #2,266 |
| 1909 | 7 | — | #1,859 |
| 1908 | 5 | — | #2,259 |
| 1906 | 7 | — | #1,630 |