Donnchadh vs Lucas
Donnchadh and Lucascompared 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.
Northern Ireland · Boys
In 2023, Donnchadh was ranked #249 and Lucas #61 among boys in Northern Ireland.
Republic of Ireland · Boys
In 2025, Donnchadh was ranked #348 and Lucas #64 among boys in Republic of Ireland.
Donnchadh and Lucas over time
Donnchadh and Lucas appear together in 2 published lists, across 44 years of shared records. Lucas held the stronger position in more years in 2 of them, Donnchadh 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.
- Mirrored each other
Over 35 shared years in Republic of Ireland · Boys, Lucas rose about as far as Donnchadh fell — from #218 and #324 in 1979 to #348 and #64 in 2025.
- Longest-running competitions
Donnchadh and Lucas were both ranked in Republic of Ireland · Boys for 35 years, from 1979 to 2025, ending at #348 and #64.
List by list
Republic of Ireland · Boys35 shared years, 1979–2025
Donnchadh held the stronger position in 6 of those years, Lucas in 29.
Highest recorded here: Donnchadh #218 in 1979, Lucas #55 in 2018.
The order changed in 1997: Lucas moved ahead. In 1996 they stood at #295 and #336; by 1997 that had become #261 and #242.
Most recent shared year, 2025: Donnchadh #348, Lucas #64.
Northern Ireland · Boys9 shared years, 2006–2023
Donnchadh held the stronger position in 0 of those years, Lucas in 9.
Highest recorded here: Donnchadh #249 in 2023, Lucas #27 in 2012.
The order between them never changed and held in this list.
Most recent shared year, 2023: Donnchadh #249, Lucas #61.
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.
Where to go next
Comparisons that share a name, a rule or a published list with this one. Each is an existing comparison page with its own evidence — nothing here says these pairs are alike.
Other comparisons involving Lucas
Pairs where Lucas shares a published list with another name, each measured inside one registrar's own list.
- Lucas vs Leon
Lucas and Leon changed places 15 times in Norway · Boys between 1979 and 2025, ending at #24 and #46.
Lucas · Leon · 42 shared years, 1979–2025 · Repeatedly exchanged positions
- Lucas vs Ludvig
Lucas and Ludvig changed places 13 times in Norway · Boys between 1985 and 2025, ending at #24 and #13.
Lucas · Ludvig · 39 shared years, 1985–2025 · Repeatedly exchanged positions
- Lucas vs Levi
Lucas and Levi both rose over the same years in 5 registrars — New South Wales, Australia · Boys; New Zealand · Boys; Northern Ireland · Boys; Norway · Boys; Republic of Ireland · Boys. Each list is measured against its own starting position; the positions are never combined.
Lucas · Levi · 38 shared years, 1980–2025 · Moved together in several countries
- Lucas vs Arthur
Lucas and Arthur both rose over the same years in 4 registrars — England and Wales · Boys; Northern Ireland · Boys; Norway · Boys; Republic of Ireland · Boys. Each list is measured against its own starting position; the positions are never combined.
Lucas · Arthur · 43 shared years, 1979–2025 · Moved together in several countries
Side by side
| Field | Donnchadh | Lucas |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | male | male |
| Meaning | Not yet recorded | The Latin form of the Greek name Loukas, ultimately linked to the English name Luke. The deeper root meaning is itself disputed — possibly a shortened form of 'from Lucania' (a region of southern Italy), or alternatively derived from the Latin name Lucius. |
| Origin | Not yet recorded | Latin, via Greek Loukas |
| Pronunciation | Not yet recorded | /ˈluːkəs/ |
| Syllables | 2 | 2 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | GB-NIR, IE | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ |
| Most recent popularity observation | Republic of Ireland · Boys #348 (2025) | New South Wales, Australia · Boys #14 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 70/100 | 94/100 |
| International familiarity (demonstration score) | 60/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Lucas has a recorded origin (Latin, via Greek Loukas); Donnchadh does not have one recorded yet.
- Donnchadh and Lucas both have 2 syllables.
- A meaning is recorded for Lucas; Donnchadh doesn't have one written yet.
- Both names have recorded usage in GB-NIR, IE.
How each name got here
Donnchadh
Popularity journey
First recorded1969
First recorded at #270 among boys in Republic of Ireland in 1969 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Boys
Highest recorded1969–2025
Highest recorded position: #212 among boys in Republic of Ireland, in 1978 (recorded 1969–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #348 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys
Lucas
Popularity journey
First recorded1976
First recorded at #607 among boys in Norway in 1976 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded1980–2025
Highest recorded position: #2 among boys in New South Wales, Australia, in 2011 (recorded 1980–2025).
New South Wales, Australia · Boys
Most recent2025
Most recently recorded at #32 among boys in England and Wales, in 2025.
England and Wales · Boys