Lachlan vs Zac
Lachlan and Zaccompared 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.
New South Wales, Australia · Boys
In 2012, Lachlan was ranked #7 and Zac #91 among boys in New South Wales, Australia.
New Zealand · Boys
In 2012, Lachlan was ranked #30 and Zac #87 among boys in New Zealand.
Scotland · Boys
In 2024, Lachlan was ranked #88 and Zac #176 among boys in Scotland.
Northern Ireland · Boys
In 2024, Lachlan was ranked #278 and Zac #216 among boys in Northern Ireland.
Republic of Ireland · Boys
In 2025, Lachlan was ranked #317 and Zac #223 among boys in Republic of Ireland.
England and Wales · Boys
In 2024, Lachlan was ranked #328 and Zac #442 among boys in England and Wales.
Lachlan and Zac over time
Lachlan and Zac appear together in 4 published lists, across 75 years of shared records. Zac held the stronger position in more years in 3 of them, Lachlan in 1.
The order between them changed and held in 2 of those lists — a change in that published list, never a claim that one name displaced the other.
Zac reached its own highest recorded position earlier in 3 of those lists, Lachlan in 1. 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.
- Mirrored each other
Over 29 shared years in England and Wales · Boys, Lachlan rose about as far as Zac fell — from #1040 and #276 in 1996 to #328 and #442 in 2024.
List by list
England and Wales · Boys29 shared years, 1996–2024
Lachlan held the stronger position in 1 of those years, Zac in 28.
Highest recorded here: Lachlan #328 in 2024, Zac #110 in 2010.
The order changed in 2024: Lachlan moved ahead. In 2023 they stood at #393 and #364; by 2024 that had become #328 and #442.
Most recent shared year, 2024: Lachlan #328, Zac #442.
Republic of Ireland · Boys22 shared years, 2003–2025
Lachlan held the stronger position in 1 of those years, Zac in 20.
Highest recorded here: Lachlan #263 in 2016, Zac #179 in 2019.
The order between them never changed and held in this list.
Most recent shared year, 2025: Lachlan #317, Zac #223.
New South Wales, Australia · Boys15 shared years, 1998–2012
Lachlan held the stronger position in 15 of those years, Zac in 0.
Highest recorded here: Lachlan #2 in 2005, Zac #65 in 2002.
The order between them never changed and held in this list.
Most recent shared year, 2012: Lachlan #7, Zac #91.
Northern Ireland · Boys9 shared years, 2004–2024
Lachlan held the stronger position in 1 of those years, Zac in 8.
Highest recorded here: Lachlan #226 in 2021, Zac #111 in 2013.
The order changed in 2007: Zac moved ahead. In 2006 they stood at #264 and #305; by 2007 that had become #255 and #179.
Most recent shared year, 2024: Lachlan #278, Zac #216.
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 | Lachlan | Zac |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Traditionally understood as 'Viking' or 'Scandinavian' via its root name — someone associated with the land of the Norsemen. A secondary reading of that root gives 'land of the lakes'. | Not yet recorded |
| Origin | Scottish Gaelic (Anglicised), from Lochlann ('Scandinavia') | Not yet recorded |
| Pronunciation | /ˈlɒklən/ | Not yet recorded |
| Syllables | 2 | 1 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ |
| Most recent popularity observation | New South Wales, Australia · Boys #34 (2025) | Republic of Ireland · Boys #223 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | Not yet recorded |
| Spelling simplicity (demonstration score) | 82/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Lachlan has a recorded origin (Scottish Gaelic (Anglicised), from Lochlann ('Scandinavia')); Zac does not have one recorded yet.
- Lachlan has 2 syllables, compared with 1 for Zac.
- A meaning is recorded for Lachlan; Zac doesn't have one written yet.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ.
How each name got here
Lachlan
Popularity journey
First recorded1982
First recorded at #95 among boys in New South Wales, Australia in 1982 — the earliest year that source publishes this name, not necessarily the earliest it was used.
New South Wales, Australia · Boys
Highest recorded1982–2025
Highest recorded position: #2 among boys in New South Wales, Australia, in 2005 (recorded 1982–2025).
New South Wales, Australia · Boys
Most recent2025
Most recently recorded at #34 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys
Zac
Popularity journey
First recorded1996
First recorded at #276 among boys in England and Wales in 1996 — the earliest year that source publishes this name, not necessarily the earliest it was used.
England and Wales · Boys
Highest recorded1998–2012
Highest recorded position: #65 among boys in New South Wales, Australia, in 2002 (recorded 1998–2012).
New South Wales, Australia · Boys
Most recent2025
Most recently recorded at #223 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys