Isabelle vs Katie
Isabelle and Katiecompared 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.
New South Wales, Australia · Girls
In 2009, Isabelle was ranked #27 and Katie #92 among girls in New South Wales, Australia.
Republic of Ireland · Girls
In 2025, Isabelle was ranked #34 and Katie #41 among girls in Republic of Ireland.
New Zealand · Girls
In 2014, Isabelle was ranked #41 and Katie #94 among girls in New Zealand.
Northern Ireland · Girls
In 2024, Isabelle was ranked #227 and Katie #47 among girls in Northern Ireland.
England and Wales · Girls
In 2024, Isabelle was ranked #52 and Katie #547 among girls in England and Wales.
Scotland · Girls
In 2024, Isabelle was ranked #207 and Katie #131 among girls in Scotland.
Isabelle and Katie over time
Isabelle and Katie appear together in 5 published lists, across 116 years of shared records. Katie held the stronger position in more years in 3 of them, Isabelle in 2.
The order between them changed and held in 4 of those lists — a change in that published list, never a claim that one name displaced the other.
Katie reached its own highest recorded position earlier in 5 of those lists, and Isabelle 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.
- One took the other's place near the top
In New Zealand · Girls, Isabelle moved into the top 50 at #40 in 2009 as Katie fell out of it to #57, having been #33 the year before.
- One moved ahead of the other
In 2008, Isabelle moved ahead of Katie in England and Wales · Girls — #21 and #18 the year before became #17 and #20.
- Longest-running competitions
Isabelle and Katie were both ranked in Republic of Ireland · Girls for 43 years, from 1979 to 2025, ending at #34 and #41.
List by list
Republic of Ireland · Girls43 shared years, 1979–2025
Isabelle held the stronger position in 6 of those years, Katie in 37.
Highest recorded here: Isabelle #26 in 2010, Katie #2 in 2004.
The order changed in 2022: Isabelle moved ahead. In 2021 they stood at #39 and #35; by 2022 that had become #27 and #34.
Most recent shared year, 2025: Isabelle #34, Katie #41.
England and Wales · Girls29 shared years, 1996–2024
Isabelle held the stronger position in 17 of those years, Katie in 12.
Highest recorded here: Isabelle #17 in 2008, Katie #9 in 2004.
The order changed in 2008: Isabelle moved ahead. In 2007 they stood at #21 and #18; by 2008 that had become #17 and #20.
Most recent shared year, 2024: Isabelle #52, Katie #547.
Northern Ireland · Girls22 shared years, 2003–2024
Isabelle held the stronger position in 0 of those years, Katie in 22.
Highest recorded here: Isabelle #109 in 2012, Katie #1 in 2004.
The order between them never changed and held in this list.
Most recent shared year, 2024: Isabelle #227, Katie #47.
New South Wales, Australia · Girls11 shared years, 1996–2009
Isabelle held the stronger position in 9 of those years, Katie in 2.
Highest recorded here: Isabelle #27 in 2009, Katie #77 in 1996.
The order changed in 1998: Isabelle moved ahead. In 1997 they stood at #84 and #77; by 1998 that had become #64 and #88.
Most recent shared year, 2009: Isabelle #27, Katie #92.
New Zealand · Girls11 shared years, 2002–2014
Isabelle held the stronger position in 4 of those years, Katie in 7.
Highest recorded here: Isabelle #37 in 2011, Katie #33 in 2008.
The order changed in 2009: Isabelle moved ahead. In 2008 they stood at #45 and #33; by 2009 that had become #40 and #57.
Most recent shared year, 2014: Isabelle #41, Katie #94.
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 | Isabelle | Katie |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | female | female |
| Meaning | Not yet recorded | A diminutive of Kate, itself a short form of Katherine. |
| Origin | Not yet recorded | Greek, diminutive form |
| Pronunciation | /ˈkeɪ.ti/ | |
| Syllables | 4 | 2 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ |
| Most recent popularity observation | Republic of Ireland · Girls #34 (2025) | Republic of Ireland · Girls #41 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 76/100 | 94/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Katie has a recorded origin (Greek, diminutive form); Isabelle does not have one recorded yet.
- Isabelle has 4 syllables, compared with 2 for Katie.
- A meaning is recorded for Katie; Isabelle doesn't have one written yet.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ.
How each name got here
Isabelle
Popularity journey
First recorded1962
First recorded at #454 among girls in Norway in 1962 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Girls
Highest recorded1996–2024
Highest recorded position: #17 among girls in England and Wales, in 2008 (recorded 1996–2024).
England and Wales · Girls
Most recent2025
Most recently recorded at #58 among girls in New South Wales, Australia, in 2025.
New South Wales, Australia · Girls
Katie
Popularity journey
First recorded1973
First recorded at #508 among girls in Republic of Ireland in 1973 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Girls
Highest recorded1997–2024
Highest recorded position: #1 among girls in Northern Ireland, in 2004 (recorded 1997–2024).
Northern Ireland · Girls
Most recent2025
Most recently recorded at #41 among girls in Republic of Ireland, in 2025.
Republic of Ireland · Girls