Isabella vs Leah
Isabella and Leahcompared 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 2025, Isabella was ranked #10 and Leah #183 among girls in England and Wales.
Norway · Girls
In 2025, Isabella was ranked #122 and Leah #12 among girls in Norway.
New Zealand · Girls
In 2022, Isabella was ranked #14 and Leah #96 among girls in New Zealand.
New South Wales, Australia · Girls
In 2025, Isabella was ranked #17 and Leah #89 among girls in New South Wales, Australia.
Northern Ireland · Girls
In 2024, Isabella was ranked #44 and Leah #119 among girls in Northern Ireland.
Republic of Ireland · Girls
In 2025, Isabella was ranked #48 and Leah #55 among girls in Republic of Ireland.
Scotland · Girls
In 2024, Isabella was ranked #50 and Leah #145 among girls in Scotland.
Isabella and Leah over time
Isabella and Leah appear together in 6 published lists, across 179 years of shared records. Neither was ahead in more lists than the other.
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.
Each reached its own highest recorded position first in 3 of the lists they share.
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 moved ahead of the other
In 2005, Isabella moved ahead of Leah in England and Wales · Girls — #34 and #24 the year before became #24 and #25.
- Repeatedly exchanged positions
Isabella and Leah changed places 5 times in Norway · Girls between 1982 and 2025, ending at #122 and #12.
- Closest over the longest run
Across 27 shared years in New Zealand · Girls, Isabella and Leah averaged 51.6 places apart, ending at #14 and #96.
- Longest-running competitions
Isabella and Leah were both ranked in England and Wales · Girls for 30 years, from 1996 to 2025, ending at #10 and #183.
- Peaked in the same years
Both reached their highest recorded position in New South Wales, Australia · Girls within 2 years — Isabella #1 in 2010, Leah #78 in 2012.
List by list
Republic of Ireland · Girls44 shared years, 1966–2025
Isabella held the stronger position in 4 of those years, Leah in 40.
Highest recorded here: Isabella #41 in 2014, Leah #9 in 2004.
The order between them never changed and held in this list.
Most recent shared year, 2025: Isabella #48, Leah #55.
Norway · Girls40 shared years, 1982–2025
Isabella held the stronger position in 14 of those years, Leah in 26.
Highest recorded here: Isabella #42 in 2010, Leah #12 in 2025.
The order changed in 2002: Leah moved ahead. In 2001 they stood at #163 and #176; by 2002 that had become #134 and #133.
Most recent shared year, 2025: Isabella #122, Leah #12.
England and Wales · Girls30 shared years, 1996–2025
Isabella held the stronger position in 21 of those years, Leah in 9.
Highest recorded here: Isabella #6 in 2016, Leah #24 in 2002.
The order changed in 2005: Isabella moved ahead. In 2004 they stood at #34 and #24; by 2005 that had become #24 and #25.
Most recent shared year, 2025: Isabella #10, Leah #183.
New Zealand · Girls27 shared years, 1995–2022
Isabella held the stronger position in 26 of those years, Leah in 1.
Highest recorded here: Isabella #4 in 2008, Leah #39 in 2012.
The order changed in 1996: Isabella moved ahead. In 1995 they stood at #90 and #67; by 1996 that had become #59 and #89.
Most recent shared year, 2022: Isabella #14, Leah #96.
Northern Ireland · Girls26 shared years, 1999–2024
Isabella held the stronger position in 9 of those years, Leah in 17.
Highest recorded here: Isabella #27 in 2019, Leah #10 in 2005.
The order changed in 2017: Isabella moved ahead. In 2016 they stood at #38 and #36; by 2017 that had become #35 and #47.
Most recent shared year, 2024: Isabella #44, Leah #119.
New South Wales, Australia · Girls12 shared years, 2001–2025
Isabella held the stronger position in 12 of those years, Leah in 0.
Highest recorded here: Isabella #1 in 2010, Leah #78 in 2012.
The order between them never changed and held in this list.
Most recent shared year, 2025: Isabella #17, Leah #89.
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 | Isabella | Leah |
|---|---|---|
| Record type | Editorially researched profile | Editorially researched profile |
| Gender usage | female | female |
| Meaning | My God is an oath (via Elizabeth). | Likely derives from a Hebrew word meaning 'weary, grieved'; an alternative theory suggests a connection to Akkadian 'littu' ('cow'). In the Old Testament, Leah was Jacob's first wife. |
| Origin | Spanish/Italian, via Elizabeth | Biblical Hebrew, etymology disputed |
| Pronunciation | /ˌɪzəˈbɛlə/ | /ˈliː.ə/ |
| Syllables | 4 | 1 |
| Common variants / nicknames | Bella, Izzy, Isabel, Isobel | 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, NO, NZ |
| Most recent popularity observation | England and Wales · Girls #10 (2025) | Norway · Girls #12 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | 90/100 |
| Spelling simplicity (demonstration score) | 76/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | high | medium |
What the data shows
- Isabella is recorded with a Spanish/Italian, via Elizabeth origin, while Leah is recorded with a Biblical Hebrew, etymology disputed origin.
- Isabella has 4 syllables, compared with 1 for Leah.
- Isabella's recorded meaning differs from Leah's — see the table above for each.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ.
- The available evidence gives Isabella a "high" Data Confidence level and Leah a "medium" level — this reflects how complete and corroborated the underlying evidence is, not a judgement of either name.
How each name got here
Isabella
Popularity journey
First recorded1960
First recorded at #472 among girls in Norway in 1960 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Girls
Highest recorded1993–2025
Highest recorded position: #1 among girls in New South Wales, Australia, in 2007 (recorded 1993–2025).
New South Wales, Australia · Girls
Most recent2025
Most recently recorded at #10 among girls in England and Wales, in 2025.
England and Wales · Girls
Leah
Popularity journey
First recorded1966
First recorded at #310 among girls in Republic of Ireland in 1966 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Girls
Highest recorded1966–2025
Highest recorded position: #9 among girls in Republic of Ireland, in 2004 (recorded 1966–2025).
Republic of Ireland · Girls
Most recent2025
Most recently recorded at #183 among girls in England and Wales, in 2025.
England and Wales · Girls