Cillian vs Flannan
Cillian and Flannancompared 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 1981, Cillian was ranked #165 and Flannan #322 among boys in Republic of Ireland.
Side by side
| Field | Cillian | Flannan |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Probably from Old Irish 'cell' (church) combined with a diminutive suffix. | Not yet recorded |
| Origin | Irish | 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, GB-SCT, IE | IE |
| Most recent popularity observation | Republic of Ireland · Boys #9 (2025) | Republic of Ireland · Boys #322 (1981) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 82/100 | 82/100 |
| International familiarity (demonstration score) | 100/100 | 40/100 |
| Data Confidence | medium | medium |
What the data shows
- Cillian has a recorded origin (Irish); Flannan does not have one recorded yet.
- Cillian and Flannan both have 2 syllables.
- A meaning is recorded for Cillian; Flannan doesn't have one written yet.
- Both names have recorded usage in IE.
How each name got here
Cillian
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 recorded1997–2024
Highest recorded position: #2 among boys in Northern Ireland, in 2024 (recorded 1997–2024).
Northern Ireland · Boys
Most recent2025
Most recently recorded at #217 among boys in England and Wales, in 2025.
England and Wales · Boys
Flannan
Popularity journey
First recorded1964
First recorded at #214 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 recorded1964–1981
Highest recorded position: #214 among boys in Republic of Ireland, in 1964 (recorded 1964–1981).
Republic of Ireland · Boys
Most recent1981
Most recently recorded at #322 among boys in Republic of Ireland, in 1981.
Republic of Ireland · Boys