Jacek vs Leif
Jacek and Leifcompared 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 1995, Jacek was ranked #593 and Leif #175 among boys in Norway.
England and Wales · Boys
In 2022, Jacek was ranked #4001 and Leif #967 among boys in England and Wales.
Jacek and Leif over time
Jacek and Leif appear together in 2 published lists, across 52 years of shared records. Leif held the stronger position in more years in 2 of them, Jacek 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.
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
Jacek and Leif changed places 7 times in England and Wales · Boys between 2006 and 2022, ending at #4001 and #967.
- Longest-running competitions
Jacek and Leif were both ranked in Norway · Boys for 40 years, from 1956 to 1995, ending at #593 and #175.
List by list
Norway · Boys40 shared years, 1956–1995
Jacek held the stronger position in 0 of those years, Leif in 40.
Highest recorded here: Jacek #116 in 1969, Leif #22 in 1956.
The order between them never changed and held in this list.
Most recent shared year, 1995: Jacek #593, Leif #175.
England and Wales · Boys12 shared years, 2006–2022
Jacek held the stronger position in 4 of those years, Leif in 7.
Highest recorded here: Jacek #1596 in 2008, Leif #967 in 2022.
The order changed in 2014: Leif moved ahead. In 2013 they stood at #2403 and #2954; by 2014 that had become #3362 and #1935.
Most recent shared year, 2022: Jacek #4001, Leif #967.
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 | Jacek | Leif |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | male | male |
| Meaning | Not yet recorded | Commonly interpreted as 'heir' or 'descendant'. |
| Origin | Not yet recorded | Old Norse |
| Pronunciation | Not yet recorded | /leɪf/ (also /liːf/) |
| Syllables | 2 | 1 |
| Common variants / nicknames | Not yet recorded | Leiv |
| Recorded regional usage | GB-ENW, IE, NO | GB-ENW, NO |
| Most recent popularity observation | England and Wales · Boys #4001 (2022) | Sweden #88 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 94/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 60/100 |
| Data Confidence | medium | high |
What the data shows
- Leif has a recorded origin (Old Norse); Jacek does not have one recorded yet.
- Jacek has 2 syllables, compared with 1 for Leif.
- A meaning is recorded for Leif; Jacek doesn't have one written yet.
- Both names have recorded usage in GB-ENW, NO.
- The available evidence gives Jacek a "medium" Data Confidence level and Leif a "high" level — this reflects how complete and corroborated the underlying evidence is, not a judgement of either name.
How each name got here
Jacek
Popularity journey
First recorded1956
First recorded at #426 among boys in Norway in 1956 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded1956–1995
Highest recorded position: #116 among boys in Norway, in 1969 (recorded 1956–1995).
Norway · Boys
Most recent2022
Most recently recorded at #4001 among boys in England and Wales, in 2022.
England and Wales · Boys
Leif
Popularity journey
First recorded1945
First recorded at #17 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: #17 among boys in Norway, in 1945 (recorded 1945–2025).
Norway · Boys
Most recent2025
Most recently recorded at #225 among boys in Norway, in 2025.
Norway · Boys