Joao vs Theo
Joao and Theocompared on official birth-registration statistics and Namewise's recorded data. This page states what each name's record shows — it never picks a winner or scores one name against the other.
Head to head
Ranks are only compared within one published list and one year. Two ranks from different years, from a boys' and a girls' list, or from different registrars are not comparable, so they are not placed side by side.
England and Wales · Boys
In 2025, Joao was ranked #1153 and Theo #12 among boys in England and Wales.
Republic of Ireland · Boys
In 2025, Joao was ranked #829 and Theo #21 among boys in Republic of Ireland.
Norway · Boys
In 2015, Joao was ranked #524 and Theo #41 among boys in Norway.
Northern Ireland · Boys
In 2008, Joao was ranked #378 and Theo #217 among boys in Northern Ireland.
Joao and Theo over time
Joao and Theo appear together in 3 published lists, across 48 years of shared records. Theo held the stronger position in more years in 2 of them, Joao in 0.
The order between them changed and held in one of those lists — a change in that published list, never a claim that one name displaced the other.
Joao reached its own highest recorded position earlier in 3 of those lists, and Theo in none. Each position is a place inside its own list, so this compares when they peaked and never how high.
Counted list by list. Two names in the same published list are measured on the same scale in the same year, so those comparisons are real — but positions from different lists are not, so nothing here is combined into an overall standing.
How this pair is related
The relationship kinds these two qualify for, each under its own stated rule. Every one is drawn from a list they both appear in.
- Longest-running competitions
Joao and Theo were both ranked in England and Wales · Boys for 30 years, from 1996 to 2025, ending at #1153 and #12.
List by list
England and Wales · Boys30 shared years, 1996–2025
Joao held the stronger position in 0 of those years, Theo in 30.
Highest recorded here: Joao #711 in 2007, Theo #9 in 2022.
The order between them never changed and held in this list.
Most recent shared year, 2025: Joao #1153, Theo #12.
Republic of Ireland · Boys10 shared years, 2006–2025
Joao held the stronger position in 0 of those years, Theo in 10.
Highest recorded here: Joao #472 in 2008, Theo #21 in 2025.
The order between them never changed and held in this list.
Most recent shared year, 2025: Joao #829, Theo #21.
Norway · Boys8 shared years, 1986–2015
Joao held the stronger position in 4 of those years, Theo in 4.
Highest recorded here: Joao #370 in 1986, Theo #41 in 2015.
The order changed in 2004: Theo moved ahead. In 2003 they stood at #480 and #495; by 2004 that had become #410 and #152.
Most recent shared year, 2015: Joao #524, Theo #41.
Two names moving past each other in a ranking is a fact about the ranking. Namewise does not claim one name displaced the other, that families chose between them, or that either influenced the other — none of that is in this data.
Where to go next
Comparisons that share a name, a rule or a published list with this one. Each is an existing comparison page with its own evidence — nothing here says these pairs are alike.
Other comparisons involving Theo
Pairs where Theo shares a published list with another name, each measured inside one registrar's own list.
- Arthur vs Theo
Arthur and Theo both rose over the same years in 5 registrars — England and Wales · Boys; New Zealand · Boys; Northern Ireland · Boys; Norway · Boys; Republic of Ireland · Boys. Each list is measured against its own starting position; the positions are never combined.
Arthur · Theo · 37 shared years, 1986–2025 · Moved together in several countries
- Henry vs Theo
Henry and Theo both rose over the same years in 5 registrars — England and Wales · Boys; New Zealand · Boys; Northern Ireland · Boys; Norway · Boys; Republic of Ireland · Boys. Each list is measured against its own starting position; the positions are never combined.
Henry · Theo · 37 shared years, 1986–2025 · Moved together in several countries
- Theo vs Archie
Theo and Archie both rose over the same years in 4 registrars — England and Wales · Boys; New Zealand · Boys; Northern Ireland · Boys; Republic of Ireland · Boys. Each list is measured against its own starting position; the positions are never combined.
Theo · Archie · 30 shared years, 1996–2025 · Moved together in several countries
- Theo vs Arlo
Theo and Arlo both rose over the same years in 4 registrars — England and Wales · Boys; New Zealand · Boys; Northern Ireland · Boys; Republic of Ireland · Boys. Each list is measured against its own starting position; the positions are never combined.
Theo · Arlo · 27 shared years, 1999–2025 · Moved together in several countries
Side by side
| Field | Joao | Theo |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | male | male |
| Meaning | Not yet recorded | Gift of God. |
| Origin | Not yet recorded | Greek, via Theodore/Theodora |
| Pronunciation | Not yet recorded | /ˈθioʊ/ |
| Syllables | 1 | 1 |
| Common variants / nicknames | Not yet recorded | Teddy |
| Recorded regional usage | GB-ENW, GB-NIR, IE, NO | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ |
| Most recent popularity observation | Republic of Ireland · Boys #829 (2025) | England and Wales · Boys #12 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 95/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | high |
What the data shows
- Theo has a recorded origin (Greek, via Theodore/Theodora); Joao does not have one recorded yet.
- Joao and Theo both have 1 syllable.
- A meaning is recorded for Theo; Joao doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, IE, NO.
- The available evidence gives Joao a "medium" Data Confidence level and Theo a "high" level — this reflects how complete and corroborated the underlying evidence is, not a judgement of either name.
How each name got here
Joao
Popularity journey
First recorded1955
First recorded at #420 among boys in Norway in 1955 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded1955–2015
Highest recorded position: #370 among boys in Norway, in 1986 (recorded 1955–2015).
Norway · Boys
Most recent2025
Most recently recorded at #1153 among boys in England and Wales, in 2025.
England and Wales · Boys
Theo
Popularity journey
First recorded1986
First recorded at #637 among boys in Norway in 1986 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded2001–2024
Highest recorded position: #4 among boys in Northern Ireland, in 2022 (recorded 2001–2024).
Northern Ireland · Boys
Most recent2025
Most recently recorded at #12 among boys in England and Wales, in 2025.
England and Wales · Boys