Liam vs Petter
Liam and Pettercompared 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, Liam was ranked #7 and Petter #146 among boys in Norway.
Liam and Petter over time
Liam and Petter appear together in 1 published list, across 36 years of shared records. Petter held the stronger position in more years in 1 of them, Liam 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.
Petter reached its own highest recorded position earlier in 1 of those lists, and Liam 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.
- One moved ahead of the other
In 2009, Liam moved ahead of Petter in Norway · Boys — #109 and #77 the year before became #50 and #93.
- Mirrored each other
Over 36 shared years in Norway · Boys, Liam rose about as far as Petter fell — from #586 and #56 in 1982 to #7 and #146 in 2025.
- Longest-running competitions
Liam and Petter were both ranked in Norway · Boys for 36 years, from 1982 to 2025, ending at #7 and #146.
List by list
Norway · Boys36 shared years, 1982–2025
Liam held the stronger position in 17 of those years, Petter in 19.
Highest recorded here: Liam #3 in 2015, Petter #28 in 1990.
The order changed in 2009: Liam moved ahead. In 2008 they stood at #109 and #77; by 2009 that had become #50 and #93.
Most recent shared year, 2025: Liam #7, Petter #146.
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 | Liam | Petter |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | A short form, inheriting its meaning from William — 'resolute protection' or 'will helmet'. | Not yet recorded |
| Origin | Irish, short form of William (via Uilliam) | Not yet recorded |
| Pronunciation | /ˈliːəm/ | Not yet recorded |
| Syllables | 1 | 2 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ | NO |
| Most recent popularity observation | Norway · Boys #7 (2025) | Norway · Boys #146 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | Not yet recorded |
| Spelling simplicity (demonstration score) | 95/100 | 88/100 |
| International familiarity (demonstration score) | 100/100 | 40/100 |
| Data Confidence | medium | medium |
What the data shows
- Liam has a recorded origin (Irish, short form of William (via Uilliam)); Petter does not have one recorded yet.
- Liam has 1 syllable, compared with 2 for Petter.
- A meaning is recorded for Liam; Petter doesn't have one written yet.
- Both names have recorded usage in NO.
How each name got here
Liam
Popularity journey
First recorded1964
First recorded at #54 among boys in Republic of Ireland in 1964 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Boys
Highest recorded1986–2023
Highest recorded position: #1 among boys in New Zealand, in 2010 (recorded 1986–2023).
New Zealand · Boys
Most recent2025
Most recently recorded at #15 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys
Petter
Popularity journey
First recorded1945
First recorded at #100 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: #28 among boys in Norway, in 1990 (recorded 1945–2025).
Norway · Boys
Most recent2025
Most recently recorded at #146 among boys in Norway, in 2025.
Norway · Boys