Billy vs Caelan
Billy and Caelancompared 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, Billy was ranked #39 and Caelan #43 among boys in Republic of Ireland.
England and Wales · Boys
In 2024, Billy was ranked #127 and Caelan #529 among boys in England and Wales.
Scotland · Boys
In 2024, Billy was ranked #234 and Caelan #165 among boys in Scotland.
Northern Ireland · Boys
In 2024, Billy was ranked #256 and Caelan #256 among boys in Northern Ireland.
Billy and Caelan over time
Billy and Caelan appear together in 3 published lists, across 79 years of shared records. Billy held the stronger position in more years in 3 of them, Caelan in 0.
In none of those lists did their order change and stay changed.
Caelan reached its own highest recorded position earlier in 2 of those lists, Billy 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
Billy and Caelan changed places 8 times in Northern Ireland · Boys between 1999 and 2024, ending at #256 and #256.
- Closest over the longest run
Across 24 shared years in Northern Ireland · Boys, Billy and Caelan averaged 55.5 places apart, ending at #256 and #256.
- Mirrored each other
Over 29 shared years in England and Wales · Boys, Caelan rose about as far as Billy fell — from #71 and #1337 in 1996 to #127 and #529 in 2024.
- Peaked in the same years
Both reached their highest recorded position in Republic of Ireland · Boys within 2 years — Billy #39 in 2025, Caelan #43 in 2024.
List by list
England and Wales · Boys29 shared years, 1996–2024
Billy held the stronger position in 29 of those years, Caelan in 0.
Highest recorded here: Billy #68 in 1998, Caelan #388 in 2015.
The order between them never changed and held in this list.
Most recent shared year, 2024: Billy #127, Caelan #529.
Republic of Ireland · Boys26 shared years, 2000–2025
Billy held the stronger position in 24 of those years, Caelan in 2.
Highest recorded here: Billy #39 in 2025, Caelan #43 in 2024.
The order between them never changed and held in this list.
Most recent shared year, 2025: Billy #39, Caelan #43.
Northern Ireland · Boys24 shared years, 1999–2024
Billy held the stronger position in 12 of those years, Caelan in 9.
Highest recorded here: Billy #169 in 2015, Caelan #152 in 2000.
The order between them never changed and held in this list.
Most recent shared year, 2024: Billy #256, Caelan #256.
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 | Billy | Caelan |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | male | male |
| Meaning | Not yet recorded | The Anglicized form of Caolán, an Irish name with roots connecting to Cáel in Irish mythology; also sometimes used as a variant of the feminine Kaylyn. |
| Origin | Not yet recorded | Irish |
| Pronunciation | /ˈkeɪ.lən/ | |
| Syllables | 2 | 2 |
| Common variants / nicknames | Not yet recorded | Caolán |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ | GB-ENW, GB-NIR, GB-SCT, IE |
| Most recent popularity observation | Republic of Ireland · Boys #39 (2025) | Republic of Ireland · Boys #43 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 94/100 | 88/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | high |
What the data shows
- Caelan has a recorded origin (Irish); Billy does not have one recorded yet.
- Billy and Caelan both have 2 syllables.
- A meaning is recorded for Caelan; Billy doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, GB-SCT, IE.
- The available evidence gives Billy a "medium" Data Confidence level and Caelan a "high" level — this reflects how complete and corroborated the underlying evidence is, not a judgement of either name.
How each name got here
Billy
Popularity journey
First recorded1970
First recorded at #305 among boys in Republic of Ireland in 1970 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Boys
Highest recorded1970–2025
Highest recorded position: #39 among boys in Republic of Ireland, in 2025 (recorded 1970–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #44 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys
Caelan
Popularity journey
First recorded1996
First recorded at #1337 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 recorded2000–2025
Highest recorded position: #43 among boys in Republic of Ireland, in 2024 (recorded 2000–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #43 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys