Arthur vs Kaj
Arthur and Kajcompared 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 2021, Arthur was ranked #4 and Kaj #4789 among boys in England and Wales.
Republic of Ireland · Boys
In 2023, Arthur was ranked #70 and Kaj #770 among boys in Republic of Ireland.
Norway · Boys
In 1994, Arthur was ranked #411 and Kaj #586 among boys in Norway.
Arthur and Kaj over time
Arthur and Kaj appear together in 2 published lists, across 51 years of shared records. Arthur held the stronger position in more years in 2 of them, Kaj 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
Arthur and Kaj changed places 10 times in Norway · Boys between 1945 and 1994, ending at #411 and #586.
- Longest-running competitions
Arthur and Kaj were both ranked in Norway · Boys for 37 years, from 1945 to 1994, ending at #411 and #586.
List by list
Norway · Boys37 shared years, 1945–1994
Arthur held the stronger position in 31 of those years, Kaj in 6.
Highest recorded here: Arthur #122 in 1946, Kaj #216 in 1959.
The order between them never changed and held in this list.
Most recent shared year, 1994: Arthur #411, Kaj #586.
England and Wales · Boys14 shared years, 1996–2021
Arthur held the stronger position in 14 of those years, Kaj in 0.
Highest recorded here: Arthur #3 in 2020, Kaj #2357 in 1996.
The order between them never changed and held in this list.
Most recent shared year, 2021: Arthur #4, Kaj #4789.
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.
Side by side
| Field | Arthur | Kaj |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Meaning debated — no single origin is established with confidence. | Not yet recorded |
| Origin | Disputed — possibly Celtic (Brittonic), possibly Roman | Not yet recorded |
| Pronunciation | /ˈɑɹθər/ | Not yet recorded |
| Syllables | 2 | 1 |
| Common variants / nicknames | Art, Artie | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ | GB-ENW, IE, NO |
| Most recent popularity observation | New South Wales, Australia · Boys #19 (2025) | Republic of Ireland · Boys #770 (2023) |
| Pronunciation clarity (demonstration score) | 90/100 | Not yet recorded |
| Spelling simplicity (demonstration score) | 88/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | high | medium |
What the data shows
- Arthur has a recorded origin (Disputed — possibly Celtic (Brittonic), possibly Roman); Kaj does not have one recorded yet.
- Arthur has 2 syllables, compared with 1 for Kaj.
- A meaning is recorded for Arthur; Kaj doesn't have one written yet.
- Both names have recorded usage in GB-ENW, IE, NO.
- The available evidence gives Arthur a "high" Data Confidence level and Kaj a "medium" level — this reflects how complete and corroborated the underlying evidence is, not a judgement of either name.
How each name got here
Arthur
Popularity journey
First recorded1945
First recorded at #153 among boys in Norway in 1945 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded1996–2024
Highest recorded position: #3 among boys in England and Wales, in 2020 (recorded 1996–2024).
England and Wales · Boys
Most recent2025
Most recently recorded at #19 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys
Kaj
Popularity journey
First recorded1945
First recorded at #320 among boys in Norway in 1945 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded1945–1994
Highest recorded position: #216 among boys in Norway, in 1959 (recorded 1945–1994).
Norway · Boys
Most recent2021
Most recently recorded at #4789 among boys in England and Wales, in 2021.
England and Wales · Boys