Declan vs William
Declan and Williamcompared 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 2010, Declan was ranked #81 and William #1 among boys in New South Wales, Australia.
New Zealand · Boys
In 2013, Declan was ranked #84 and William #4 among boys in New Zealand.
England and Wales · Boys
In 2024, Declan was ranked #371 and William #27 among boys in England and Wales.
Northern Ireland · Boys
In 2024, Declan was ranked #256 and William #64 among boys in Northern Ireland.
Scotland · Boys
In 2024, Declan was ranked #404 and William #66 among boys in Scotland.
Republic of Ireland · Boys
In 2025, Declan was ranked #348 and William #73 among boys in Republic of Ireland.
Declan and William over time
Declan and William appear together in 3 published lists, across 119 years of shared records. William held the stronger position in more years in 3 of them, Declan in 0.
In none of those lists did their order change and stay changed.
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.
- Longest-running competitions
Declan and William were both ranked in Republic of Ireland · Boys for 62 years, from 1964 to 2025, ending at #348 and #73.
- Peaked in the same years
Both reached their highest recorded position in Northern Ireland · Boys within 2 years — Declan #54 in 1997, William #26 in 1997.
List by list
Republic of Ireland · Boys62 shared years, 1964–2025
Declan held the stronger position in 0 of those years, William in 62.
Highest recorded here: Declan #12 in 1971, William #8 in 1964.
The order between them never changed and held in this list.
Most recent shared year, 2025: Declan #348, William #73.
England and Wales · Boys29 shared years, 1996–2024
Declan held the stronger position in 0 of those years, William in 29.
Highest recorded here: Declan #66 in 2000, William #7 in 2006.
The order between them never changed and held in this list.
Most recent shared year, 2024: Declan #371, William #27.
Northern Ireland · Boys28 shared years, 1997–2024
Declan held the stronger position in 0 of those years, William in 28.
Highest recorded here: Declan #54 in 1997, William #26 in 1997.
The order between them never changed and held in this list.
Most recent shared year, 2024: Declan #256, William #64.
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 | Declan | William |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | male | male |
| Meaning | Not yet recorded | Commonly interpreted as 'resolute protector' or 'will helmet', combining the ideas of desire/will and protection. |
| Origin | Not yet recorded | Germanic (Old Frankish/Old High German Willehelm) |
| Pronunciation | Not yet recorded | /ˈwɪljəm/ |
| Syllables | 2 | 2 |
| 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, NO, NZ |
| Most recent popularity observation | Republic of Ireland · Boys #348 (2025) | Norway · Boys #3 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 88/100 | 82/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- William has a recorded origin (Germanic (Old Frankish/Old High German Willehelm)); Declan does not have one recorded yet.
- Declan and William both have 2 syllables.
- A meaning is recorded for William; Declan 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
Declan
Popularity journey
First recorded1964
First recorded at #23 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 recorded1964–2025
Highest recorded position: #12 among boys in Republic of Ireland, in 1971 (recorded 1964–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #348 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys
William
Popularity journey
First recorded1945
First recorded at #277 among boys in Norway in 1945 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded1952–2025
Highest recorded position: #1 among boys in New South Wales, Australia, in 2009 (recorded 1952–2025).
New South Wales, Australia · Boys
Most recent2025
Most recently recorded at #11 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys