Theo
A baby boy name that reached its highest Australian ranking in 2025 at 15th.
Popularity of Theo in Australia
2024 #16→2025 #15Up 1 place
Theo ranks 15th for boys in the latest available Australian data (2025). That is also its highest recorded rank in the years currently covered. Since first appearing at 93rd in 2015, it has moved up 78 places overall. In the latest year-to-year comparison it rose 1 place.
View yearly ranks
| Year | Rank |
|---|---|
| 2025 | #15 |
| 2024 | #16 |
| 2023 | #16 |
| 2022 | #17 |
| 2021 | #27 |
| 2020 | #39 |
| 2019 | #45 |
| 2018 | #61 |
| 2017 | #76 |
| 2016 | #88 |
| 2015 | #93 |
Quick answers
Questions about Theo
Is Theo a popular name in Australia?
Theo ranked #15 for baby boys in Australia in 2025.
Is Theo becoming more popular?
Yes. Theo moved from #16 in 2024 to #15 in 2025, a rise of 1 place. Over the full visible history it moved from #93 in 2015 to #15 in 2025.
Is Theo a girl or boy name?
On Baby Names Australia, Theo appears as a baby boy name.
Names similar to Theo
If you like Theo, explore these name lists
Cute baby boy namesTheo has a soft, friendly sound and a simple shape that suits a cute-name shortlist.Explore →Australian boy namesTheo appears in the Australian ranking data, so it is useful for parents comparing names used locally.Explore →Short baby boy namesTheo is 4 letters long, so it fits the short-name brief cleanly.Explore →
About the data
Popularity figures use the Australian ranking datasets used by Baby Names Australia, with source-priority rules applied where public sources overlap.
Latest data year
2025
Last updated
2026-08-20