Louis or Theo

Theo is the more popular boy name in Canada, #17 to #31 in 2024. Theo is the more popular boy name in England and Wales, #12 to #49 in 2025. Theo is the more popular boy name in the USA, #80 to #236 in 2024.

Louis on its own page Theo on its own page

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.

Where each place ranks Louis against Theo, in that place's most recent complete year.LouisTheo#1#50#100#250Canada#31 → #17 ↑14England and Wales#49 → #12 ↑37USA#236 → #80 ↑156Alberta#153 → #47 ↑106British Columbia#137 → #26 ↑111Ontario#131 → #33 ↑98Quebec#6 → #10 ↓4
PlaceYear Louis Theo Ahead
Canada2024#31#17Theo
England and Wales2025#49#12Theo
USA2024#236#80Theo
Alberta2024#153#47Theo
British Columbia2024#137#26Theo
Ontario2024#131#33Theo
Quebec2024#6#10Louis

Louis and Theo in Canada, 2020–2024

Louis climbed from #46 in 2020 to #31 in 2024 in Canada. Theo climbed from #30 in 2020 to #17 in 2024 in Canada.

Louis and Theo ranked by year in Canada, 2020 to 2024.#1#50#17 Theo#31 Louis20202021202220232024

See the full Canada boy names list for 2024 →

Louis and Theo in England and Wales, 2020–2025

Louis climbed from #52 in 2020 to #49 in 2025 in England and Wales. Theo climbed from #17 in 2020 to #12 in 2025 in England and Wales.

Louis and Theo ranked by year in England and Wales, 2020 to 2025.#1#50#100#12 Theo#49 Louis202020212022202320242025

See the full England and Wales boy names list for 2025 →

Louis and Theo in the USA, 2020–2024

Louis climbed from #260 in 2020 to #236 in 2024 in the USA. Theo climbed from #172 in 2020 to #80 in 2024 in the USA.

Louis and Theo ranked by year in USA, 2020 to 2024.#1#250#500#80 Theo#236 Louis20202021202220232024

See the full USA boy names list for 2024 →

Other comparisons

More head-to-heads with Louis
Adam or LouisArthur or LouisCharles or LouisEdouard or LouisEmile or LouisJacob or LouisJames or LouisJules or LouisLaurent or LouisLeo or LouisLiam or LouisLouis or LucasLouis or NathanLouis or NoahLouis or RaphaelLouis or TheodoreLouis or ThomasLouis or William
More head-to-heads with Theo
Adam or TheoAlfie or TheoArchie or TheoArlo or TheoArthur or TheoBenjamin or TheoCharles or TheoEdouard or TheoEmile or TheoEthan or TheoFinley or TheoFreddie or TheoGeorge or TheoHarry or TheoHenry or TheoJack or TheoJacob or TheoJames or TheoJude or TheoJules or TheoLaurent or TheoLeo or TheoLevi or TheoLiam or TheoLogan or TheoLuca or TheoLucas or TheoMohammed or TheoMuhammad or TheoNathan or TheoNoah or TheoOliver or TheoOscar or TheoRaphael or TheoRory or TheoTheo or TheodoreTheo or ThomasTheo or William

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.