Declan vs Denis
Declan and Deniscompared 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, Declan was ranked #348 and Denis #232 among boys in Republic of Ireland.
Northern Ireland · Boys
In 2024, Declan was ranked #256 and Denis #305 among boys in Northern Ireland.
England and Wales · Boys
In 2024, Declan was ranked #371 and Denis #434 among boys in England and Wales.
Declan and Denis over time
Declan and Denis appear together in 3 published lists, across 108 years of shared records. Declan held the stronger position in more years in 3 of them, Denis in 0.
In none of those lists did their order change and stay changed.
Declan reached its own highest recorded position earlier in 2 of those lists, Denis 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.
- Repeatedly exchanged positions
Declan and Denis changed places 4 times in Republic of Ireland · Boys between 1964 and 2025, ending at #348 and #232.
- Closest over the longest run
Across 62 shared years in Republic of Ireland · Boys, Declan and Denis averaged 50.8 places apart, ending at #348 and #232.
- Longest-running competitions
Declan and Denis were both ranked in Republic of Ireland · Boys for 62 years, from 1964 to 2025, ending at #348 and #232.
List by list
Republic of Ireland · Boys62 shared years, 1964–2025
Declan held the stronger position in 38 of those years, Denis in 24.
Highest recorded here: Declan #12 in 1971, Denis #21 in 1964.
The order between them never changed and held in this list.
Most recent shared year, 2025: Declan #348, Denis #232.
England and Wales · Boys29 shared years, 1996–2024
Declan held the stronger position in 23 of those years, Denis in 6.
Highest recorded here: Declan #66 in 2000, Denis #262 in 2020.
The order between them never changed and held in this list.
Most recent shared year, 2024: Declan #371, Denis #434.
Northern Ireland · Boys17 shared years, 1998–2024
Declan held the stronger position in 16 of those years, Denis in 0.
Highest recorded here: Declan #58 in 1998, Denis #231 in 2011.
The order between them never changed and held in this list.
Most recent shared year, 2024: Declan #256, Denis #305.
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 | Denis |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Not yet recorded | Not yet recorded |
| Origin | Not yet recorded | Not yet recorded |
| Pronunciation | Not yet recorded | Not yet recorded |
| 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, IE, NO, NZ |
| Most recent popularity observation | Republic of Ireland · Boys #348 (2025) | Republic of Ireland · Boys #232 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 88/100 | 94/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Declan and Denis both have 2 syllables.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, 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
Denis
Popularity journey
First recorded1952
First recorded at #65 among boys in New South Wales, Australia in 1952 — the earliest year that source publishes this name, not necessarily the earliest it was used.
New South Wales, Australia · Boys
Highest recorded1964–2025
Highest recorded position: #21 among boys in Republic of Ireland, in 1964 (recorded 1964–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #232 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys