Julian vs Theo
Julian 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.
Scotland · Boys
In 2024, Julian was ranked #234 and Theo #4 among boys in Scotland.
Northern Ireland · Boys
In 2023, Julian was ranked #348 and Theo #9 among boys in Northern Ireland.
England and Wales · Boys
In 2025, Julian was ranked #314 and Theo #12 among boys in England and Wales.
Republic of Ireland · Boys
In 2025, Julian was ranked #348 and Theo #21 among boys in Republic of Ireland.
Norway · Boys
In 2025, Julian was ranked #54 and Theo #22 among boys in Norway.
New South Wales, Australia · Boys
In 2024, Julian was ranked #87 and Theo #38 among boys in New South Wales, Australia.
Julian and Theo over time
Julian and Theo appear together in 3 published lists, across 95 years of shared records. Theo held the stronger position in more years in 2 of them, Julian in 1.
The order between them changed and held in 2 of those lists — a change in that published list, never a claim that one name displaced the other.
Julian reached its own highest recorded position earlier in 2 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.
- One took the other's place near the top
In Norway · Boys, Theo moved into the top 50 at #35 in 2017 as Julian fell out of it to #54, having been #41 the year before.
- One moved ahead of the other
In 2017, Theo moved ahead of Julian in Norway · Boys — #41 and #42 the year before became #54 and #35.
- Mirrored each other
Over 29 shared years in Republic of Ireland · Boys, Theo rose about as far as Julian fell — from #186 and #319 in 1988 to #348 and #21 in 2025.
- Longest-running competitions
Julian and Theo were both ranked in England and Wales · Boys for 30 years, from 1996 to 2025, ending at #314 and #12.
- Peaked in the same years
Both reached their highest recorded position in England and Wales · Boys within 2 years — Julian #267 in 2022, Theo #9 in 2022.
List by list
Norway · Boys36 shared years, 1986–2025
Julian held the stronger position in 25 of those years, Theo in 11.
Highest recorded here: Julian #26 in 2011, Theo #17 in 2024.
The order changed in 2017: Theo moved ahead. In 2016 they stood at #41 and #42; by 2017 that had become #54 and #35.
Most recent shared year, 2025: Julian #54, Theo #22.
England and Wales · Boys30 shared years, 1996–2025
Julian held the stronger position in 0 of those years, Theo in 30.
Highest recorded here: Julian #267 in 2022, Theo #9 in 2022.
The order between them never changed and held in this list.
Most recent shared year, 2025: Julian #314, Theo #12.
Republic of Ireland · Boys29 shared years, 1988–2025
Julian held the stronger position in 2 of those years, Theo in 24.
Highest recorded here: Julian #183 in 2020, Theo #13 in 2024.
The order changed in 2000: Theo moved ahead. In 1999 they stood at #290 and #330; by 2000 that had become #390 and #347.
Most recent shared year, 2025: Julian #348, Theo #21.
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 | Julian | 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 | 2 | 1 |
| Common variants / nicknames | Not yet recorded | Teddy |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ |
| Most recent popularity observation | Norway · Boys #54 (2025) | England and Wales · Boys #12 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 88/100 | 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); Julian does not have one recorded yet.
- Julian has 2 syllables, compared with 1 for Theo.
- A meaning is recorded for Theo; Julian doesn't have one written yet.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ.
- The available evidence gives Julian 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
Julian
Popularity journey
First recorded1964
First recorded at #191 among boys in Republic of Ireland in 1964 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Boys
Highest recorded1967–2025
Highest recorded position: #26 among boys in Norway, in 2011 (recorded 1967–2025).
Norway · Boys
Most recent2025
Most recently recorded at #314 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