Theta
Theta reached its high-water mark in 1907 at number 840, and has been recorded 402 times in all. It has not appeared in the national data since 2015. About 110 Thetas are alive in the United States today, and half of them are over 76.
Popularity, 1880–2025
girls named Theta
By the numbers
- Total US births
- 402
- Estimated living today
- 110
- Median age today
- 76
- Peak year
- 1907
- Best rank
- 840th
- Rank in 2025
- unranked
- First recorded
- 1907
How old the living Thetas are
born that year still alive today
Of the 402 babies given the name since 1907, about 110 are alive — 28 in every hundred. The dotted line is the median: half were born before 1949 and half after.
An estimate, not a count. SSA births aged forward through SSA cohort life tables, which know nothing about who left the country or arrived in it — so for a name that mostly came to America rather than being born in it, this is a floor rather than a figure. Where you fall among living Americans.
Where Theta is most common
Total births recorded in each state since 1910. Browse names by state.
Names of 1907
The most popular girls’ names the year Theta peaked:
Related names
Theta against another name
Two names on one chart, with the year one overtook the other.
Try it on yourself
Source: US Social Security Administration, national and state baby-name files, 1880–2025. Counts include only births registered with the SSA, and names with fewer than five births in a year are not published. The living estimate applies SSA cohort life tables to those births; it counts people born in the United States, so it misses anyone who arrived later and anyone who has left.