Olivier vs Theo
Olivier 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, Olivier was ranked #727 and Theo #4 among boys in Scotland.
England and Wales · Boys
In 2025, Olivier was ranked #976 and Theo #12 among boys in England and Wales.
Northern Ireland · Boys
In 2019, Olivier was ranked #365 and Theo #13 among boys in Northern Ireland.
Republic of Ireland · Boys
In 2025, Olivier was ranked #829 and Theo #21 among boys in Republic of Ireland.
Norway · Boys
In 2025, Olivier was ranked #513 and Theo #22 among boys in Norway.
Olivier and Theo over time
Olivier and Theo appear together in 4 published lists, across 84 years of shared records. Theo held the stronger position in more years in 4 of them, Olivier 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.
Olivier reached its own highest recorded position earlier in 4 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 moved ahead of the other
In 2006, Theo moved ahead of Olivier in Norway · Boys — #631 and #637 the year before became #471 and #85.
- Mirrored each other
Over 21 shared years in Republic of Ireland · Boys, Theo rose about as far as Olivier fell — from #448 and #302 in 2005 to #829 and #21 in 2025.
- Longest-running competitions
Olivier and Theo were both ranked in England and Wales · Boys for 30 years, from 1996 to 2025, ending at #976 and #12.
List by list
England and Wales · Boys30 shared years, 1996–2025
Olivier held the stronger position in 0 of those years, Theo in 30.
Highest recorded here: Olivier #266 in 2010, Theo #9 in 2022.
The order between them never changed and held in this list.
Most recent shared year, 2025: Olivier #976, Theo #12.
Norway · Boys21 shared years, 1986–2025
Olivier held the stronger position in 1 of those years, Theo in 20.
Highest recorded here: Olivier #270 in 2017, Theo #17 in 2024.
The order changed in 2006: Theo moved ahead. In 2005 they stood at #631 and #637; by 2006 that had become #471 and #85.
Most recent shared year, 2025: Olivier #513, Theo #22.
Republic of Ireland · Boys21 shared years, 2005–2025
Olivier held the stronger position in 1 of those years, Theo in 20.
Highest recorded here: Olivier #191 in 2008, Theo #13 in 2024.
The order between them never changed and held in this list.
Most recent shared year, 2025: Olivier #829, Theo #21.
Northern Ireland · Boys12 shared years, 2007–2019
Olivier held the stronger position in 0 of those years, Theo in 12.
Highest recorded here: Olivier #230 in 2010, Theo #13 in 2019.
The order between them never changed and held in this list.
Most recent shared year, 2019: Olivier #365, Theo #13.
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 | Olivier | 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 | 3 | 1 |
| Common variants / nicknames | Not yet recorded | Teddy |
| Recorded regional usage | GB-ENW, GB-NIR, GB-SCT, IE, NO | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ |
| Most recent popularity observation | Norway · Boys #513 (2025) | England and Wales · Boys #12 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 82/100 | 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); Olivier does not have one recorded yet.
- Olivier has 3 syllables, compared with 1 for Theo.
- A meaning is recorded for Theo; Olivier doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, GB-SCT, IE, NO.
- The available evidence gives Olivier 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
Olivier
Popularity journey
First recorded1969
First recorded at #533 among boys in Norway in 1969 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded2005–2025
Highest recorded position: #191 among boys in Republic of Ireland, in 2008 (recorded 2005–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #976 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