Bo vs Kaj
Bo 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.
Norway · Boys
In 1992, Bo was ranked #487 and Kaj #495 among boys in Norway.
Republic of Ireland · Boys
In 2023, Bo was ranked #660 and Kaj #770 among boys in Republic of Ireland.
England and Wales · Boys
In 2021, Bo was ranked #1117 and Kaj #4789 among boys in England and Wales.
Bo and Kaj over time
Bo and Kaj appear together in 2 published lists, across 46 years of shared records. Bo 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.
Kaj reached its own highest recorded position earlier in 1 of those lists, and Bo 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
Bo and Kaj were both ranked in Norway · Boys for 37 years, from 1945 to 1992, ending at #487 and #495.
- Peaked in the same years
Both reached their highest recorded position in Norway · Boys within 2 years — Bo #212 in 1959, Kaj #216 in 1959.
List by list
Norway · Boys37 shared years, 1945–1992
Bo held the stronger position in 36 of those years, Kaj in 1.
Highest recorded here: Bo #212 in 1959, Kaj #216 in 1959.
The order between them never changed and held in this list.
Most recent shared year, 1992: Bo #487, Kaj #495.
England and Wales · Boys9 shared years, 2004–2021
Bo held the stronger position in 9 of those years, Kaj in 0.
Highest recorded here: Bo #1117 in 2021, Kaj #3651 in 2004.
The order between them never changed and held in this list.
Most recent shared year, 2021: Bo #1117, 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 | Bo | Kaj |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Official statistical record (evidence-only) |
| Gender usage | Used for both boys and girls | male |
| Meaning | Not yet recorded | Not yet recorded |
| Origin | Not yet recorded | Not yet recorded |
| Pronunciation | Not yet recorded | Not yet recorded |
| Syllables | 1 | 1 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | GB-ENW, IE, NO | GB-ENW, IE, NO |
| Most recent popularity observation | Norway · Boys #129 (2025) | Republic of Ireland · Boys #770 (2023) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 95/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Bo and Kaj both have 1 syllable.
- Both names have recorded usage in GB-ENW, IE, NO.
How each name got here
Bo
Popularity journey
First recorded1945
First recorded at #294 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: #129 among boys in Norway, in 2024 (recorded 1945–2025).
Norway · Boys
Most recent2025
Most recently recorded at #129 among boys in Norway, in 2025.
Norway · 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