Myrtha is a very rare girls' name that was most common in the 1920s and has all but disappeared.
Myrtha is a girl name. It last appears in U.S. records in 1990. Myrtha was first reported in SSA data in 1898 and peaked in 1925 (15 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1990 | 7 | — | #10,998 |
| 1982 | 6 | — | #10,036 |
| 1971 | 7 | — | #7,117 |
| 1965 | 6 | — | #6,292 |
| 1964 | 5 | — | #7,468 |
| 1962 | 5 | — | #7,253 |
| 1961 | 8 | — | #5,161 |
| 1960 | 8 | — | #5,048 |
| 1957 | 5 | — | #6,758 |
| 1956 | 5 | — | #6,605 |
| 1952 | 5 | — | #6,157 |
| 1950 | 6 | — | #5,118 |
| 1948 | 5 | — | #5,790 |
| 1942 | 5 | — | #5,154 |
| 1940 | 6 | — | #4,209 |
| 1938 | 8 | — | #3,376 |
| 1937 | 8 | — | #3,354 |
| 1936 | 8 | — | #3,306 |
| 1934 | 8 | — | #3,381 |
| 1933 | 7 | — | #3,657 |
| 1932 | 5 | — | #4,896 |
| 1931 | 5 | — | #4,787 |
| 1930 | 8 | — | #3,566 |
| 1929 | 7 | — | #3,941 |
| 1927 | 6 | — | #4,661 |
| 1926 | 5 | — | #5,393 |
| 1925 | 15 | — | #2,461 |
| 1924 | 6 | — | #4,875 |
| 1923 | 10 | — | #3,294 |
| 1922 | 7 | — | #4,319 |
| 1921 | 7 | — | #4,325 |
| 1919 | 8 | — | #3,708 |
| 1918 | 7 | — | #4,159 |
| 1917 | 6 | — | #4,449 |
| 1916 | 9 | — | #3,189 |
| 1915 | 5 | — | #4,766 |
| 1913 | 5 | — | #3,550 |
| 1912 | 10 | — | #1,942 |
| 1900 | 5 | — | #2,134 |
| 1898 | 6 | — | #1,641 |