Aaron vs Killian
Aaron and Killiancompared 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, Aaron was ranked #71 and Killian #141 among boys in Republic of Ireland.
Scotland · Boys
In 2024, Aaron was ranked #114 and Killian #268 among boys in Scotland.
England and Wales · Boys
In 2024, Aaron was ranked #154 and Killian #638 among boys in England and Wales.
Northern Ireland · Boys
In 2024, Aaron was ranked #187 and Killian #187 among boys in Northern Ireland.
Aaron and Killian over time
Aaron and Killian appear together in 3 published lists, across 116 years of shared records. Aaron held the stronger position in more years in 3 of them, Killian in 0.
In none of those lists did their order change and stay changed.
Aaron reached its own highest recorded position earlier in 3 of those lists, and Killian 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.
- Repeatedly exchanged positions
Aaron and Killian changed places 4 times in Republic of Ireland · Boys between 1965 and 2025, ending at #71 and #141.
- Closest over the longest run
Across 60 shared years in Republic of Ireland · Boys, Aaron and Killian averaged 51.0 places apart, ending at #71 and #141.
- Longest-running competitions
Aaron and Killian were both ranked in Republic of Ireland · Boys for 60 years, from 1965 to 2025, ending at #71 and #141.
List by list
Republic of Ireland · Boys60 shared years, 1965–2025
Aaron held the stronger position in 58 of those years, Killian in 2.
Highest recorded here: Aaron #6 in 1998, Killian #55 in 2001.
The order between them never changed and held in this list.
Most recent shared year, 2025: Aaron #71, Killian #141.
England and Wales · Boys29 shared years, 1996–2024
Aaron held the stronger position in 29 of those years, Killian in 0.
Highest recorded here: Aaron #31 in 1998, Killian #492 in 2022.
The order between them never changed and held in this list.
Most recent shared year, 2024: Aaron #154, Killian #638.
Northern Ireland · Boys27 shared years, 1997–2024
Aaron held the stronger position in 26 of those years, Killian in 0.
Highest recorded here: Aaron #8 in 2000, Killian #157 in 2017.
The order between them never changed and held in this list.
Most recent shared year, 2024: Aaron #187, Killian #187.
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 | Aaron | Killian |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Best known as the name of Moses's elder brother and the first high priest of Israel in the Old Testament; the literal meaning of the name itself is not reliably established. | Not yet recorded |
| Origin | Biblical Hebrew (likely of Egyptian origin) | Not yet recorded |
| Pronunciation | /ˈɛrən/ | 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, NO, NZ | GB-ENW, GB-NIR, GB-SCT, IE |
| Most recent popularity observation | Republic of Ireland · Boys #71 (2025) | Republic of Ireland · Boys #141 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | Not yet recorded |
| Spelling simplicity (demonstration score) | 94/100 | 82/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Aaron has a recorded origin (Biblical Hebrew (likely of Egyptian origin)); Killian does not have one recorded yet.
- Aaron and Killian both have 2 syllables.
- A meaning is recorded for Aaron; Killian doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, GB-SCT, IE.
How each name got here
Aaron
Popularity journey
First recorded1965
First recorded at #222 among boys in Republic of Ireland in 1965 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Boys
Highest recorded1965–2025
Highest recorded position: #6 among boys in Republic of Ireland, in 1998 (recorded 1965–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #334 among boys in Norway, in 2025.
Norway · Boys
Killian
Popularity journey
First recorded1964
First recorded at #204 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: #55 among boys in Republic of Ireland, in 2001 (recorded 1964–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #141 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys