Cillian vs Rollo
Cillian and Rollocompared 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.
England and Wales · Boys
In 2024, Cillian was ranked #177 and Rollo #1859 among boys in England and Wales.
Cillian and Rollo over time
Cillian and Rollo appear together in 1 published list, across 23 years of shared records. Cillian held the stronger position in more years in 1 of them, Rollo in 0.
The order between them changed and held in one of those lists — a change in that published list, never a claim that one name displaced the other.
Rollo reached its own highest recorded position earlier in 1 of those lists, and Cillian 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.
List by list
England and Wales · Boys23 shared years, 1998–2024
Cillian held the stronger position in 20 of those years, Rollo in 2.
Highest recorded here: Cillian #177 in 2024, Rollo #1391 in 2021.
The order changed in 2007: Cillian moved ahead. In 2006 they stood at #3009 and #1878; by 2007 that had become #782 and #3589.
Most recent shared year, 2024: Cillian #177, Rollo #1859.
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 | Cillian | Rollo |
|---|---|---|
| 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 | GB-ENW |
| Most recent popularity observation | Republic of Ireland · Boys #9 (2025) | England and Wales · Boys #1859 (2024) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 82/100 | 94/100 |
| International familiarity (demonstration score) | 100/100 | 40/100 |
| Data Confidence | medium | medium |
What the data shows
- Cillian has a recorded origin (Irish); Rollo does not have one recorded yet.
- Cillian and Rollo both have 2 syllables.
- A meaning is recorded for Cillian; Rollo doesn't have one written yet.
- Both names have recorded usage in GB-ENW.
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 #9 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys
Rollo
Popularity journey
First recorded1998
First recorded at #2074 among boys in England and Wales in 1998 — the earliest year that source publishes this name, not necessarily the earliest it was used.
England and Wales · Boys
Highest recorded1998–2024
Highest recorded position: #1391 among boys in England and Wales, in 2021 (recorded 1998–2024).
England and Wales · Boys
Most recent2024
Most recently recorded at #1859 among boys in England and Wales, in 2024.
England and Wales · Boys