Compare Names
Search for up to 4 names to compare side by side, or browse a curated comparison below.
- Leo
- Theodore
| Field | Leo | Theodore |
|---|---|---|
| Record type | Editorially researched profile | Editorially researched profile |
| Gender usage | male | male |
| Meaning | Lion. | Gift of God. |
| Origin | Latin | Greek |
| Pronunciation | /ˈliːoʊ/ | /ˈθiəˌdɔɹ/ |
| Syllables | 1 | 3 |
| Common variants / nicknames | Not yet recorded | Teddy |
| Recorded regional usage | New South Wales, Australia, England and Wales, Northern Ireland, Scotland, Republic of Ireland, Norway, New Zealand | New South Wales, Australia, England and Wales, Northern Ireland, Scotland, Republic of Ireland, New Zealand |
| Most recent popularity observation | England and Wales · Boys #3 (2025) | New South Wales, Australia · Boys #3 (2025) |
| Data Confidence | medium | high |
What the data shows
- Leo is recorded with a Latin origin, while Theodore is recorded with a Greek origin.
- Leo has 1 syllable, compared with 3 for Theodore.
- Leo's recorded meaning differs from Theodore's — see the table above for each.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ.
- The available evidence gives Leo a "medium" Data Confidence level and Theodore a "high" level — this reflects how complete and corroborated the underlying evidence is, not a judgement of either name.
Name rivalries — pairs whose positions genuinely passed each other →
Curated comparisons
Two of the UK's most enduringly popular girls' names, both with a soft, flowing sound and a similar era of peak popularity — the choice usually comes down to origin story and nickname preference.
Both are currently the most-used boys' names in several English-speaking countries. Oliver leans slightly more classic/literary; Noah is shorter and more globally portable.
Both short, currently-fashionable UK names — Freya carries Norse mythological weight, while Isla is a Scottish place name that reads as slightly softer and more understated.
Both carry regal, 'strength'-adjacent meanings and centuries of royal usage — Alexander is the more internationally familiar choice, Magnus the more distinctive.