Kai vs Rolf
Kai and Rolf compared 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 2025, Kai was ranked #282 and Rolf #437 among boys in Norway.
Kai and Rolf over time
Higher on the chart is a stronger position. The scale is logarithmic, so the gap from #1 to #10 is drawn as large as the gap from #100 to #1,000.
Kai and Rolf over time
Kai and Rolf appear together in 1 published list, across 81 years of shared records. Rolf held the stronger position in more years in 1 of them, Kai 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.
Rolf reached its own highest recorded position earlier in 1 of those lists, and Kai 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.
- Repeatedly exchanged positions
Kai and Rolf changed places 13 times in Norway · Boys between 1945 and 2025, ending at #282 and #437.
- Closest over the longest run
Across 81 shared years in Norway · Boys, Kai and Rolf averaged 54.4 places apart, ending at #282 and #437.
- Longest-running competitions
Kai and Rolf were both ranked in Norway · Boys for 81 years, from 1945 to 2025, ending at #282 and #437.
List by list
Norway · Boys81 shared years, 1945–2025
Kai held the stronger position in 30 of those years, Rolf in 51.
Highest recorded here: Kai #57 in 1976, Rolf #14 in 1950.
The order changed in 2021: Kai moved ahead. In 2020 they stood at #369 and #331; by 2021 that had become #238 and #489.
Most recent shared year, 2025: Kai #282, Rolf #437.
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 | Kai | Rolf |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Not yet recorded | Not yet recorded |
| Origin | Not yet recorded | Not yet recorded |
| Pronunciation | Not yet recorded | |
| Syllables | 1 | 1 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | New South Wales, Australia, England and Wales, Northern Ireland, Scotland, Republic of Ireland, Norway | Republic of Ireland, Norway |
| Most recent popularity observation | New South Wales, Australia · Boys #23 (2025) | Norway · Boys #437 (2025) |
| Data Confidence | medium | medium |
What the data shows
- Kai and Rolf both have 1 syllable.
- Both names have recorded usage in IE, NO.
How each name got here
Kai
Popularity journey
First recorded1945
First recorded at #76 among boys in Norway in 1945 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded2002–2025
Highest recorded position: #20 among boys in New South Wales, Australia, in 2023 (recorded 2002–2025).
New South Wales, Australia · Boys
Most recent2025
Most recently recorded at #4867 among girls in England and Wales, in 2025.
England and Wales · Girls
Rolf
Popularity journey
First recorded1945
First recorded at #15 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: #14 among boys in Norway, in 1950 (recorded 1945–2025).
Norway · Boys
Most recent2025
Most recently recorded at #437 among boys in Norway, in 2025.
Norway · Boys