Arlo vs Senan
Arlo and Senancompared 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, Arlo was ranked #15 and Senan #2263 among boys in England and Wales.
Republic of Ireland · Boys
In 2025, Arlo was ranked #54 and Senan #38 among boys in Republic of Ireland.
Northern Ireland · Boys
In 2024, Arlo was ranked #45 and Senan #104 among boys in Northern Ireland.
Arlo and Senan over time
Arlo and Senan appear together in 3 published lists, across 55 years of shared records. Senan held the stronger position in more years in 2 of them, Arlo in 1.
The order between them changed and held in 2 of those lists — a change in that published list, never a claim that one name displaced the other.
Senan reached its own highest recorded position earlier in 2 of those lists, Arlo 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.
- One moved ahead of the other
In 2021, Arlo moved ahead of Senan in Northern Ireland · Boys — #80 and #65 the year before became #62 and #95.
- Repeatedly exchanged positions
Arlo and Senan changed places 5 times in Northern Ireland · Boys between 2011 and 2024, ending at #45 and #104.
- Peaked in the same years
Both reached their highest recorded position in Republic of Ireland · Boys within 2 years — Arlo #48 in 2024, Senan #38 in 2025.
List by list
England and Wales · Boys25 shared years, 1999–2024
Arlo held the stronger position in 23 of those years, Senan in 2.
Highest recorded here: Arlo #14 in 2023, Senan #1339 in 2017.
The order changed in 2001: Arlo moved ahead. In 2000 they stood at #2142 and #1889; by 2001 that had become #1949 and #3134.
Most recent shared year, 2024: Arlo #15, Senan #2263.
Republic of Ireland · Boys17 shared years, 2009–2025
Arlo held the stronger position in 2 of those years, Senan in 15.
Highest recorded here: Arlo #48 in 2024, Senan #38 in 2025.
The order between them never changed and held in this list.
Most recent shared year, 2025: Arlo #54, Senan #38.
Northern Ireland · Boys13 shared years, 2011–2024
Arlo held the stronger position in 6 of those years, Senan in 7.
Highest recorded here: Arlo #40 in 2023, Senan #65 in 2020.
The order changed in 2021: Arlo moved ahead. In 2020 they stood at #80 and #65; by 2021 that had become #62 and #95.
Most recent shared year, 2024: Arlo #45, Senan #104.
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 | Arlo | Senan |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Meaning uncertain — likely derived by Edmund Spenser from the real Irish place name Aherlow ('between two highlands') for the fictional Arlo Hill in The Faerie Queene (1590). | Not yet recorded |
| Origin | Irish (place name origin, via literary adaptation) | Not yet recorded |
| Pronunciation | /ˈɑɹ.loʊ/ | 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, NZ | GB-ENW, GB-NIR, IE |
| Most recent popularity observation | New South Wales, Australia · Boys #47 (2025) | Republic of Ireland · Boys #38 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | Not yet recorded |
| Spelling simplicity (demonstration score) | 95/100 | 94/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Arlo has a recorded origin (Irish (place name origin, via literary adaptation)); Senan does not have one recorded yet.
- Arlo and Senan both have 2 syllables.
- A meaning is recorded for Arlo; Senan doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, IE.
How each name got here
Arlo
Popularity journey
First recorded1999
First recorded at #2943 among boys in England and Wales in 1999 — the earliest year that source publishes this name, not necessarily the earliest it was used.
England and Wales · Boys
Highest recorded2013–2023
Highest recorded position: #10 among boys in New Zealand, in 2017 (recorded 2013–2023).
New Zealand · Boys
Most recent2025
Most recently recorded at #47 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys
Senan
Popularity journey
First recorded1964
First recorded at #191 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: #38 among boys in Republic of Ireland, in 2025 (recorded 1964–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #38 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys