Cian vs Zac
Cian 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.
Republic of Ireland · Boys
In 2025, Cian was ranked #33 and Zac #223 among boys in Republic of Ireland.
Northern Ireland · Boys
In 2024, Cian was ranked #45 and Zac #216 among boys in Northern Ireland.
Scotland · Boys
In 2024, Cian was ranked #181 and Zac #176 among boys in Scotland.
England and Wales · Boys
In 2024, Cian was ranked #355 and Zac #442 among boys in England and Wales.
Cian and Zac over time
Cian and Zac appear together in 3 published lists, across 80 years of shared records. Cian held the stronger position in more years in 2 of them, Zac in 1.
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.
Cian reached its own highest recorded position earlier in 2 of those lists, Zac 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.
List by list
England and Wales · Boys29 shared years, 1996–2024
Cian held the stronger position in 6 of those years, Zac in 23.
Highest recorded here: Cian #177 in 2004, Zac #110 in 2010.
The order changed in 2024: Cian moved ahead. In 2023 they stood at #396 and #364; by 2024 that had become #355 and #442.
Most recent shared year, 2024: Cian #355, Zac #442.
Northern Ireland · Boys26 shared years, 1999–2024
Cian held the stronger position in 25 of those years, Zac in 1.
Highest recorded here: Cian #45 in 2024, Zac #88 in 2010.
The order between them never changed and held in this list.
Most recent shared year, 2024: Cian #45, Zac #216.
Republic of Ireland · Boys25 shared years, 2001–2025
Cian held the stronger position in 25 of those years, Zac in 0.
Highest recorded here: Cian #6 in 2001, Zac #179 in 2019.
The order between them never changed and held in this list.
Most recent shared year, 2025: Cian #33, Zac #223.
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 | Cian | Zac |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Commonly interpreted as 'ancient' or 'enduring'. | Not yet recorded |
| Origin | Irish | Not yet recorded |
| Pronunciation | /ˈkiːən/ | Not yet recorded |
| Syllables | 1 | 1 |
| Common variants / nicknames | Kian | Not yet recorded |
| Recorded regional usage | GB-ENW, GB-NIR, GB-SCT, IE | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ |
| Most recent popularity observation | Republic of Ireland #24 (2025) | Republic of Ireland · Boys #223 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | Not yet recorded |
| Spelling simplicity (demonstration score) | 95/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | high | medium |
What the data shows
- Cian has a recorded origin (Irish); Zac does not have one recorded yet.
- Cian and Zac both have 1 syllable.
- A meaning is recorded for Cian; Zac doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, GB-SCT, IE.
- The available evidence gives Cian a "high" Data Confidence level and Zac a "medium" level — this reflects how complete and corroborated the underlying evidence is, not a judgement of either name.
How each name got here
Cian
Popularity journey
First recorded1966
First recorded at #177 among boys in Republic of Ireland in 1966 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Boys
Highest recorded1966–2025
Highest recorded position: #6 among boys in Republic of Ireland, in 2000 (recorded 1966–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #24 in Republic of Ireland, in 2025.
Republic of Ireland
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