Kai vs Senan
Kai 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.
Republic of Ireland · Boys
In 2025, Kai was ranked #34 and Senan #38 among boys in Republic of Ireland.
Northern Ireland · Boys
In 2024, Kai was ranked #69 and Senan #104 among boys in Northern Ireland.
England and Wales · Boys
In 2024, Kai was ranked #72 and Senan #2263 among boys in England and Wales.
Kai and Senan over time
Kai and Senan appear together in 3 published lists, across 76 years of shared records. Kai held the stronger position in more years in 2 of them, Senan in 1.
In none of those lists did their order change and stay changed.
Kai reached its own highest recorded position earlier in 2 of those lists, Senan 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.
- Closest over the longest run
Across 28 shared years in Republic of Ireland · Boys, Kai and Senan averaged 49.8 places apart, ending at #34 and #38.
- Peaked in the same years
Both reached their highest recorded position in Northern Ireland · Boys within 2 years — Kai #52 in 2021, Senan #65 in 2020.
List by list
Republic of Ireland · Boys28 shared years, 1997–2025
Kai held the stronger position in 5 of those years, Senan in 22.
Highest recorded here: Kai #30 in 2024, Senan #38 in 2025.
The order between them never changed and held in this list.
Most recent shared year, 2025: Kai #34, Senan #38.
England and Wales · Boys26 shared years, 1997–2024
Kai held the stronger position in 26 of those years, Senan in 0.
Highest recorded here: Kai #56 in 2003, Senan #1339 in 2017.
The order between them never changed and held in this list.
Most recent shared year, 2024: Kai #72, Senan #2263.
Northern Ireland · Boys22 shared years, 2003–2024
Kai held the stronger position in 21 of those years, Senan in 1.
Highest recorded here: Kai #52 in 2021, Senan #65 in 2020.
The order between them never changed and held in this list.
Most recent shared year, 2024: Kai #69, 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 | Kai | Senan |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Not yet recorded | Not yet recorded |
| Origin | Not yet recorded | Not yet recorded |
| Pronunciation | Not yet recorded | Not yet recorded |
| Syllables | 1 | 2 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO | GB-ENW, GB-NIR, IE |
| Most recent popularity observation | New South Wales, Australia · Boys #23 (2025) | Republic of Ireland · Boys #38 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 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
- Kai has 1 syllable, compared with 2 for Senan.
- Both names have recorded usage in GB-ENW, GB-NIR, IE.
How each name got here
Kai
Popularity journey
First recorded1945
First recorded at #76 among boys in Norway in 1945 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded2002–2025
Highest recorded position: #20 among boys in New South Wales, Australia, in 2023 (recorded 2002–2025).
New South Wales, Australia · Boys
Most recent2025
Most recently recorded at #23 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