Isabella vs Siomha
Isabella and Siomhacompared 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 2017, Isabella was ranked #6 and Siomha #5765 among girls in England and Wales.
Republic of Ireland · Girls
In 2017, Isabella was ranked #48 and Siomha #249 among girls in Republic of Ireland.
Northern Ireland · Girls
In 2006, Isabella was ranked #93 and Siomha #384 among girls in Northern Ireland.
Isabella and Siomha over time
Isabella and Siomha appear together in 1 published list, across 15 years of shared records. Isabella held the stronger position in more years in 1 of them, Siomha 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.
Isabella reached its own highest recorded position earlier in 1 of those lists, and Siomha 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 Republic of Ireland · Girls within 2 years — Isabella #41 in 2014, Siomha #228 in 2016.
List by list
Republic of Ireland · Girls15 shared years, 1995–2017
Isabella held the stronger position in 14 of those years, Siomha in 1.
Highest recorded here: Isabella #41 in 2014, Siomha #228 in 2016.
The order changed in 1999: Isabella moved ahead. In 1998 they stood at #516 and #384; by 1999 that had become #211 and #528.
Most recent shared year, 2017: Isabella #48, Siomha #249.
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 | Siomha |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | female | female |
| Meaning | My God is an oath (via Elizabeth). | Not yet recorded |
| Origin | Spanish/Italian, via Elizabeth | Not yet recorded |
| Pronunciation | /ˌɪzəˈbɛlə/ | Not yet recorded |
| Syllables | 4 | 2 |
| Common variants / nicknames | Bella, Izzy, Isabel, Isobel | 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 | England and Wales · Girls #10 (2025) | Republic of Ireland · Girls #249 (2017) |
| Pronunciation clarity (demonstration score) | 90/100 | Not yet recorded |
| Spelling simplicity (demonstration score) | 76/100 | 88/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | high | medium |
What the data shows
- Isabella has a recorded origin (Spanish/Italian, via Elizabeth); Siomha does not have one recorded yet.
- Isabella has 4 syllables, compared with 2 for Siomha.
- A meaning is recorded for Isabella; Siomha doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, IE.
- The available evidence gives Isabella a "high" Data Confidence level and Siomha 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
Siomha
Popularity journey
First recorded1984
First recorded at #516 among girls in Republic of Ireland in 1984 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Girls
Highest recorded1984–2017
Highest recorded position: #228 among girls in Republic of Ireland, in 2016 (recorded 1984–2017).
Republic of Ireland · Girls
Most recent2017
Most recently recorded at #249 among girls in Republic of Ireland, in 2017.
Republic of Ireland · Girls