Gustav vs Theo
Gustav 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 2023, Gustav was ranked #2325 and Theo #11 among boys in England and Wales.
Norway · Boys
In 2025, Gustav was ranked #19 and Theo #22 among boys in Norway.
Gustav and Theo over time
Gustav and Theo appear together in 2 published lists, across 61 years of shared records. Theo held the stronger position in more years in 1 of them, Gustav in 0.
In none of those lists did their order change and stay changed.
Each reached its own highest recorded position first in 1 of the lists they share.
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.
- Repeatedly exchanged positions
Gustav and Theo changed places 4 times in Norway · Boys between 1986 and 2025, ending at #19 and #22.
- Longest-running competitions
Gustav and Theo were both ranked in Norway · Boys for 36 years, from 1986 to 2025, ending at #19 and #22.
- Peaked in the same years
Both reached their highest recorded position in Norway · Boys within 2 years — Gustav #19 in 2025, Theo #17 in 2024.
List by list
Norway · Boys36 shared years, 1986–2025
Gustav held the stronger position in 18 of those years, Theo in 18.
Highest recorded here: Gustav #19 in 2025, Theo #17 in 2024.
The order between them never changed and held in this list.
Most recent shared year, 2025: Gustav #19, Theo #22.
England and Wales · Boys25 shared years, 1997–2023
Gustav held the stronger position in 0 of those years, Theo in 25.
Highest recorded here: Gustav #1786 in 2015, Theo #9 in 2022.
The order between them never changed and held in this list.
Most recent shared year, 2023: Gustav #2325, Theo #11.
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 Gustav
Pairs where Gustav shares a published list with another name, each measured inside one registrar's own list.
- Aksel vs Gustav
Aksel and Gustav were both ranked in Norway · Boys for 81 years, from 1945 to 2025, ending at #25 and #19.
Aksel · Gustav · 81 shared years, 1945–2025 · Longest-running competitions
- Anders vs Gustav
Anders and Gustav were both ranked in Norway · Boys for 81 years, from 1945 to 2025, ending at #293 and #19.
Anders · Gustav · 81 shared years, 1945–2025 · Longest-running competitions
- Andreas vs Gustav
Andreas and Gustav were both ranked in Norway · Boys for 81 years, from 1945 to 2025, ending at #96 and #19.
Andreas · Gustav · 81 shared years, 1945–2025 · Longest-running competitions
- Arne vs Gustav
Arne and Gustav were both ranked in Norway · Boys for 81 years, from 1945 to 2025, ending at #222 and #19.
Arne · Gustav · 81 shared years, 1945–2025 · Longest-running competitions
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 | Gustav | 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 | GB-ENW, NO | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ |
| Most recent popularity observation | Norway · Boys #19 (2025) | Republic of Ireland · Boys #21 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 88/100 | 95/100 |
| International familiarity (demonstration score) | 60/100 | 100/100 |
| Data Confidence | medium | high |
What the data shows
- Theo has a recorded origin (Greek, via Theodore/Theodora); Gustav does not have one recorded yet.
- Gustav has 2 syllables, compared with 1 for Theo.
- A meaning is recorded for Theo; Gustav doesn't have one written yet.
- Both names have recorded usage in GB-ENW, NO.
- The available evidence gives Gustav 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
Gustav
Popularity journey
First recorded1945
First recorded at #154 among boys in Norway in 1945 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded1945–2025
Highest recorded position: #19 among boys in Norway, in 2025 (recorded 1945–2025).
Norway · Boys
Most recent2025
Most recently recorded at #19 among boys in Norway, in 2025.
Norway · 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 #32 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys