Leo vs Theo
Leo is the more popular boy name in Canada, #4 to #17 in 2023. Leo is the more popular boy name in the United States, #24 to #80 in 2024.
Place by place
Each place ranks its own registered births, so the two names are compared inside one list at a time, in that place's most recent complete year.
| Place | Year | Leo | Theo | Ahead |
|---|---|---|---|---|
| Canada | 2023 | #4 | #17 | Leo |
| United States | 2024 | #24 | #80 | Leo |
| Alberta | 2024 | #7 | #47 | Leo |
| British Columbia | 2024 | #6 | #26 | Leo |
| Ontario | 2024 | #10 | #33 | Leo |
| Quebec | 2024 | #2 | #10 | Leo |
Leo and Theo in Canada, 2020–2023
Leo climbed from #5 in 2020 to #4 in 2023 in Canada. Theo climbed from #30 in 2020 to #17 in 2023 in Canada.
Leo and Theo in the United States, 2020–2024
Leo climbed from #36 in 2020 to #24 in 2024 in the United States. Theo climbed from #172 in 2020 to #80 in 2024 in the United States.
Other comparisons
How this comparison is built
Both names are ranked by how many babies were registered with that exact spelling, so every position here counts real births rather than votes or searches. Rank is the only measure every source publishes, so it is what the charts plot; birth counts are not released for every place.
A place appears only in the years it published a complete list, which is why a name can be missing from a year it was almost certainly given to some babies. See every head-to-head on the site, or the ranked lists these names come from.