Thea vs Thedore
American parents have registered 20,118 Theas since 1880, against 1,136 Thedores. Thea is still ahead, with 867 babies in 2025.
Babies given each name, 1880–2025
Thea Thedore
Each line is every baby given the name that year, girls and boys added together — the only count that means the same thing for both names. A line breaks where the name fell below five babies in a year — the point at which the SSA stops publishing it — rather than being drawn through a figure nobody published. A single published year in a gap shows as a dot.
Who was ahead
Of the 145 years in which either name was published, Thea for 126 years and Thedore for 19 years. The lead changed hands 16 times.
- 1880–1902 Thea ahead
- 1905–1907 Thedore ahead
- 1908–1916 Thea ahead
- 1917–1936 Thedore ahead, apart from one short spell
- 1939–2025 Thea ahead
11 shorter spells of a year or two are folded into the spans above rather than listed separately.
Side by side
| Thea | Thedore | |
|---|---|---|
| Total US births | 20,118 | 1,136 |
| Most in one year | 1,209 | 34 |
| Babies in 2025 | 867 | under 5 |
| Estimated living today | 19,000 | 330 |
| Median age today | 8 | 70 |
| Peak year | 2018 | 1929 |
| Best rank | 273rd girls | 1,195th boys |
| Rank in 2025 | 353rd | unranked |
| First recorded | 1880 | 1902 |
| Girls / boys | 20,113 / 5 | 0 / 1,136 |
A rank is a position within one sex’s list for one year, so the two rank rows are not subtracted from one another and the winning column is not marked on them. The living figure is a life-table estimate, not a count.
Which name is older
Half of the Thedores alive today are over 70; half the Theas are over 8. That is 62 years between them: two names in use at the same time, worn by two different generations.
Where each one is strongest
How much commoner the name is in that state than it is nationally, from births recorded since 1910.
Compare something else
Related comparisons
Social Security Administration birth records, 1880–2025, public domain. Full histories: Thea and Thedore.