Arlo or Theo
Theo is the more popular boy name in Canada, #17 to #88 in 2024. Theo is the more popular boy name in England and Wales, #12 to #15 in 2025. Theo is the more popular boy name in the USA, #80 to #146 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 | Arlo | Theo | Ahead |
|---|---|---|---|---|
| Canada | 2024 | #88 | #17 | Theo |
| England and Wales | 2025 | #15 | #12 | Theo |
| USA | 2024 | #146 | #80 | Theo |
| Alberta | 2024 | #131 | #47 | Theo |
| British Columbia | 2024 | #63 | #26 | Theo |
| Ontario | 2024 | #122 | #33 | Theo |
| Quebec | 2024 | #104 | #10 | Theo |
Arlo and Theo in Canada, 2020–2024
Arlo climbed from #147 in 2020 to #88 in 2024 in Canada. Theo climbed from #30 in 2020 to #17 in 2024 in Canada.
Arlo and Theo in England and Wales, 2020–2025
Arlo climbed from #27 in 2020 to #15 in 2025 in England and Wales. Theo climbed from #17 in 2020 to #12 in 2025 in England and Wales.
Arlo and Theo in the USA, 2020–2024
Arlo climbed from #220 in 2020 to #146 in 2024 in the USA. Theo climbed from #172 in 2020 to #80 in 2024 in the USA.
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.