Jill vs Kai
Jill and Kaicompared 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 · Girls
In 2012, Jill was ranked #5876 and Kai #3285 among girls in England and Wales.
Jill and Kai over time
Jill and Kai appear together in 1 published list, across 11 years of shared records. Kai held the stronger position in more years in 1 of them, Jill 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.
Jill 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.
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.
- Peaked in the same years
Both reached their highest recorded position in England and Wales · Girls within 2 years — Jill #1914 in 1996, Kai #1126 in 1997.
List by list
England and Wales · Girls11 shared years, 1996–2012
Jill held the stronger position in 2 of those years, Kai in 9.
Highest recorded here: Jill #1914 in 1996, Kai #1126 in 1997.
The order changed in 2012: Kai moved ahead. In 2011 they stood at #4012 and #5707; by 2012 that had become #5876 and #3285.
Most recent shared year, 2012: Jill #5876, Kai #3285.
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 | Jill | Kai |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Official statistical record (evidence-only) |
| Gender usage | female | male |
| Meaning | Not yet recorded | Not yet recorded |
| Origin | Not yet recorded | Not yet recorded |
| Pronunciation | Not yet recorded | |
| Syllables | 1 | 1 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, IE, NO, NZ | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO |
| Most recent popularity observation | Republic of Ireland · Girls #747 (2022) | New South Wales, Australia · Boys #23 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 95/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Jill and Kai both have 1 syllable.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, IE, NO.
How each name got here
Jill
Popularity journey
First recorded1948
First recorded at #376 among girls in Norway in 1948 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Girls
Highest recorded1952–1959
Highest recorded position: #62 among girls in New South Wales, Australia, in 1952 (recorded 1952–1959).
New South Wales, Australia · Girls
Most recent2022
Most recently recorded at #747 among girls in Republic of Ireland, in 2022.
Republic of Ireland · Girls
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