Si vs Therese
Si and Theresecompared 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.
Republic of Ireland · Girls
In 2003, Si was ranked #559 and Therese #333 among girls in Republic of Ireland.
England and Wales · Girls
In 2014, Si was ranked #4003 and Therese #5691 among girls in England and Wales.
Si and Therese over time
Si and Therese appear together in 1 published list, across 11 years of shared records. Therese held the stronger position in more years in 1 of them, Si 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.
Therese reached its own highest recorded position earlier in 1 of those lists, and Si 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.
List by list
England and Wales · Girls11 shared years, 1998–2014
Si held the stronger position in 4 of those years, Therese in 6.
Highest recorded here: Si #1653 in 2010, Therese #2084 in 2005.
The order changed in 2014: Si moved ahead. In 2013 they stood at #4838 and #4838; by 2014 that had become #4003 and #5691.
Most recent shared year, 2014: Si #4003, Therese #5691.
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 | Si | Therese |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Official statistical record (evidence-only) |
| Gender usage | female | female |
| Meaning | Not yet recorded | Not yet recorded |
| Origin | Not yet recorded | Not yet recorded |
| Pronunciation | Not yet recorded | |
| Syllables | 1 | 3 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | GB-ENW, IE | AU-NSW, GB-ENW, GB-NIR, IE, NO |
| Most recent popularity observation | England and Wales · Girls #5666 (2018) | Norway · Girls #487 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 95/100 | 82/100 |
| International familiarity (demonstration score) | 60/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Si has 1 syllable, compared with 3 for Therese.
- Both names have recorded usage in GB-ENW, IE.
How each name got here
Si
Popularity journey
First recorded1998
First recorded at #2701 among girls in England and Wales in 1998 — the earliest year that source publishes this name, not necessarily the earliest it was used.
England and Wales · Girls
Most recent2018
Most recently recorded at #5666 among girls in England and Wales, in 2018.
England and Wales · Girls
Therese
Popularity journey
First recorded1946
First recorded at #363 among girls in Norway in 1946 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Girls
Highest recorded1946–2025
Highest recorded position: #21 among girls in Norway, in 1986 (recorded 1946–2025).
Norway · Girls
Most recent2025
Most recently recorded at #487 among girls in Norway, in 2025.
Norway · Girls