Aideen vs Caithlin
Aideen and Caithlincompared 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 · Girls
In 2002, Aideen was ranked #209 and Caithlin #339 among girls in Northern Ireland.
Republic of Ireland · Girls
In 2010, Aideen was ranked #276 and Caithlin #758 among girls in Republic of Ireland.
Aideen and Caithlin over time
Aideen and Caithlin appear together in 1 published list, across 12 years of shared records. Aideen held the stronger position in more years in 1 of them, Caithlin in 0.
In none of those lists did their order change and stay changed.
Aideen reached its own highest recorded position earlier in 1 of those lists, and Caithlin in none. 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.
- Peaked in the same years
Both reached their highest recorded position in Republic of Ireland · Girls within 2 years — Aideen #107 in 1998, Caithlin #294 in 1999.
List by list
Republic of Ireland · Girls12 shared years, 1997–2010
Aideen held the stronger position in 11 of those years, Caithlin in 1.
Highest recorded here: Aideen #107 in 1998, Caithlin #294 in 1999.
The order between them never changed and held in this list.
Most recent shared year, 2010: Aideen #276, Caithlin #758.
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 | Aideen | Caithlin |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Official statistical record (evidence-only) |
| Gender usage | female | female |
| 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 | GB-ENW, GB-NIR, IE | GB-ENW, GB-NIR, IE |
| Most recent popularity observation | Republic of Ireland · Girls #885 (2025) | Republic of Ireland · Girls #758 (2010) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 88/100 | 76/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Aideen and Caithlin both have 2 syllables.
- Both names have recorded usage in GB-ENW, GB-NIR, IE.
How each name got here
Aideen
Popularity journey
First recorded1964
First recorded at #171 among girls in Republic of Ireland in 1964 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Girls
Highest recorded1964–2025
Highest recorded position: #106 among girls in Republic of Ireland, in 1991 (recorded 1964–2025).
Republic of Ireland · Girls
Most recent2025
Most recently recorded at #885 among girls in Republic of Ireland, in 2025.
Republic of Ireland · Girls
Caithlin
Popularity journey
First recorded1997
First recorded at #440 among girls in Republic of Ireland in 1997 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Girls
Highest recorded1998–2006
Highest recorded position: #293 among girls in Northern Ireland, in 2001 (recorded 1998–2006).
Northern Ireland · Girls
Most recent2010
Most recently recorded at #758 among girls in Republic of Ireland, in 2010.
Republic of Ireland · Girls