Kai vs Seosamh
Kai and Seosamhcompared 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 Seosamh #829 among boys in Republic of Ireland.
Northern Ireland · Boys
In 2022, Kai was ranked #67 and Seosamh #414 among boys in Northern Ireland.
Kai and Seosamh over time
Kai and Seosamh appear together in 1 published list, across 13 years of shared records. Kai held the stronger position in more years in 1 of them, Seosamh 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.
Seosamh reached its own highest recorded position earlier in 1 of those lists, and Kai 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
Republic of Ireland · Boys13 shared years, 2000–2025
Kai held the stronger position in 12 of those years, Seosamh in 1.
Highest recorded here: Kai #33 in 2022, Seosamh #274 in 2000.
The order changed in 2007: Kai moved ahead. In 2006 they stood at #312 and #274; by 2007 that had become #201 and #473.
Most recent shared year, 2025: Kai #34, Seosamh #829.
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.
Where to go next
Comparisons that share a name, a rule or a published list with this one. Each is an existing comparison page with its own evidence — nothing here says these pairs are alike.
Other comparisons involving Kai
Pairs where Kai shares a published list with another name, each measured inside one registrar's own list.
- Aksel vs Kai
Aksel and Kai were both ranked in Norway · Boys for 81 years, from 1945 to 2025, ending at #25 and #282.
Aksel · Kai · 81 shared years, 1945–2025 · Longest-running competitions
- Anders vs Kai
Anders and Kai were both ranked in Norway · Boys for 81 years, from 1945 to 2025, ending at #293 and #282.
Anders · Kai · 81 shared years, 1945–2025 · Longest-running competitions
- Andreas vs Kai
Andreas and Kai were both ranked in Norway · Boys for 81 years, from 1945 to 2025, ending at #96 and #282.
Andreas · Kai · 81 shared years, 1945–2025 · Longest-running competitions
- Arne vs Kai
Arne and Kai were both ranked in Norway · Boys for 81 years, from 1945 to 2025, ending at #222 and #282.
Arne · Kai · 81 shared years, 1945–2025 · Longest-running competitions
Side by side
| Field | Kai | Seosamh |
|---|---|---|
| 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-NIR, IE |
| Most recent popularity observation | New South Wales, Australia · Boys #23 (2025) | Republic of Ireland · Boys #829 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 95/100 | 82/100 |
| International familiarity (demonstration score) | 100/100 | 60/100 |
| Data Confidence | medium | medium |
What the data shows
- Kai has 1 syllable, compared with 2 for Seosamh.
- Both names have recorded usage in 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
Seosamh
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 recorded1964–2025
Highest recorded position: #214 among boys in Republic of Ireland, in 1964 (recorded 1964–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #829 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys