Theta is a rare variant of Theda that was most common in the 1900s and has all but disappeared.
Theta is a girl name. It last appears in U.S. records in 2015. Theta was first reported in SSA data in 1907 and peaked in 1907 (20 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2015 | 5 | 5 | #18,872 |
| 1969 | 5 | — | #8,592 |
| 1962 | 10 | — | #4,509 |
| 1960 | 6 | — | #6,335 |
| 1959 | 9 | — | #4,599 |
| 1958 | 7 | — | #5,359 |
| 1957 | 6 | — | #6,026 |
| 1956 | 6 | — | #5,907 |
| 1951 | 5 | — | #6,146 |
| 1950 | 7 | — | #4,698 |
| 1949 | 5 | — | #5,987 |
| 1948 | 12 | — | #3,123 |
| 1946 | 6 | — | #4,917 |
| 1945 | 6 | — | #4,511 |
| 1944 | 6 | — | #4,527 |
| 1943 | 7 | — | #4,163 |
| 1942 | 5 | — | #5,310 |
| 1941 | 6 | — | #4,380 |
| 1940 | 9 | — | #3,188 |
| 1938 | 10 | — | #2,914 |
| 1936 | 8 | — | #3,348 |
| 1935 | 14 | — | #2,296 |
| 1934 | 9 | — | #3,134 |
| 1933 | 10 | — | #2,849 |
| 1932 | 16 | — | #2,115 |
| 1931 | 6 | — | #4,292 |
| 1930 | 11 | — | #2,826 |
| 1929 | 10 | — | #3,116 |
| 1928 | 17 | — | #2,181 |
| 1927 | 12 | — | #2,846 |
| 1926 | 9 | — | #3,533 |
| 1925 | 6 | — | #4,909 |
| 1924 | 8 | — | #3,975 |
| 1923 | 10 | — | #3,335 |
| 1922 | 16 | — | #2,374 |
| 1921 | 13 | — | #2,751 |
| 1919 | 6 | — | #4,757 |
| 1918 | 5 | — | #5,514 |
| 1917 | 19 | — | #1,913 |
| 1916 | 11 | — | #2,814 |
| 1912 | 8 | — | #2,337 |
| 1910 | 7 | — | #2,121 |
| 1909 | 7 | — | #1,939 |
| 1908 | 6 | — | #2,078 |
| 1907 | 20 | — | #868 |