Felix vs Kajus
Felix and Kajuscompared 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, Felix was ranked #62 and Kajus #2088 among boys in England and Wales.
Republic of Ireland · Boys
In 2025, Felix was ranked #135 and Kajus #829 among boys in Republic of Ireland.
Northern Ireland · Boys
In 2020, Felix was ranked #231 and Kajus #334 among boys in Northern Ireland.
Felix and Kajus over time
Felix and Kajus appear together in 3 published lists, across 52 years of shared records. Felix held the stronger position in more years in 3 of them, Kajus in 0.
In none of those lists did their order change and stay changed.
Kajus reached its own highest recorded position earlier in 3 of those lists, and Felix 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
Felix and Kajus changed places 6 times in Northern Ireland · Boys between 2007 and 2020, ending at #231 and #334.
List by list
England and Wales · Boys21 shared years, 2004–2024
Felix held the stronger position in 21 of those years, Kajus in 0.
Highest recorded here: Felix #62 in 2024, Kajus #611 in 2013.
The order between them never changed and held in this list.
Most recent shared year, 2024: Felix #62, Kajus #2088.
Republic of Ireland · Boys19 shared years, 2006–2025
Felix held the stronger position in 16 of those years, Kajus in 3.
Highest recorded here: Felix #135 in 2025, Kajus #211 in 2010.
The order between them never changed and held in this list.
Most recent shared year, 2025: Felix #135, Kajus #829.
Northern Ireland · Boys12 shared years, 2007–2020
Felix held the stronger position in 8 of those years, Kajus in 2.
Highest recorded here: Felix #171 in 2018, Kajus #204 in 2012.
The order between them never changed and held in this list.
Most recent shared year, 2020: Felix #231, Kajus #334.
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 | Felix | Kajus |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Traditionally associated with the ideas of 'lucky' or 'fortunate, successful', reflecting its use as a favourable Roman cognomen. | Not yet recorded |
| Origin | Latin | Not yet recorded |
| Pronunciation | /ˈfiːlɪks/ | 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, IE |
| Most recent popularity observation | Norway · Boys #40 (2025) | Republic of Ireland · Boys #829 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | Not yet recorded |
| Spelling simplicity (demonstration score) | 94/100 | 94/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Felix has a recorded origin (Latin); Kajus does not have one recorded yet.
- Felix and Kajus both have 2 syllables.
- A meaning is recorded for Felix; Kajus doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, IE.
How each name got here
Felix
Popularity journey
First recorded1964
First recorded at #164 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 recorded2006–2023
Highest recorded position: #31 among boys in New Zealand, in 2023 (recorded 2006–2023).
New Zealand · Boys
Most recent2025
Most recently recorded at #60 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys
Kajus
Popularity journey
First recorded2004
First recorded at #2304 among boys in England and Wales in 2004 — the earliest year that source publishes this name, not necessarily the earliest it was used.
England and Wales · Boys
Highest recorded2007–2020
Highest recorded position: #204 among boys in Northern Ireland, in 2012 (recorded 2007–2020).
Northern Ireland · Boys
Most recent2025
Most recently recorded at #829 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys