Cassandra vs Sonia
Cassandra and Soniacompared 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 1978, Cassandra was ranked #65 and Sonia #97 among girls in New South Wales, Australia.
Norway · Girls
In 2025, Cassandra was ranked #340 and Sonia #421 among girls in Norway.
England and Wales · Girls
In 2024, Cassandra was ranked #510 and Sonia #1160 among girls in England and Wales.
Republic of Ireland · Girls
In 2025, Cassandra was ranked #885 and Sonia #718 among girls in Republic of Ireland.
Cassandra and Sonia over time
Cassandra and Sonia appear together in 4 published lists, across 110 years of shared records. Sonia held the stronger position in more years in 2 of them, Cassandra in 1.
The order between them changed and held in 2 of those lists — a change in that published list, never a claim that one name displaced the other.
Sonia reached its own highest recorded position earlier in 3 of those lists, and Cassandra 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 moved ahead of the other
In 1974, Cassandra moved ahead of Sonia in New South Wales, Australia · Girls — #80 and #55 the year before became #55 and #63.
- Repeatedly exchanged positions
Cassandra and Sonia changed places 10 times in Norway · Girls between 1986 and 2025, ending at #340 and #421.
- Longest-running competitions
Cassandra and Sonia were both ranked in Norway · Girls for 36 years, from 1986 to 2025, ending at #340 and #421.
- Peaked in the same years
Both reached their highest recorded position in England and Wales · Girls within 2 years — Cassandra #319 in 1996, Sonia #296 in 1996.
List by list
Norway · Girls36 shared years, 1986–2025
Cassandra held the stronger position in 30 of those years, Sonia in 6.
Highest recorded here: Cassandra #180 in 2010, Sonia #299 in 1987.
The order between them never changed and held in this list.
Most recent shared year, 2025: Cassandra #340, Sonia #421.
Republic of Ireland · Girls35 shared years, 1976–2025
Cassandra held the stronger position in 7 of those years, Sonia in 26.
Highest recorded here: Cassandra #227 in 1986, Sonia #163 in 1981.
The order between them never changed and held in this list.
Most recent shared year, 2025: Cassandra #885, Sonia #718.
England and Wales · Girls29 shared years, 1996–2024
Cassandra held the stronger position in 4 of those years, Sonia in 25.
Highest recorded here: Cassandra #319 in 1996, Sonia #296 in 1996.
The order changed in 2022: Cassandra moved ahead. In 2021 they stood at #747 and #667; by 2022 that had become #534 and #982.
Most recent shared year, 2024: Cassandra #510, Sonia #1160.
New South Wales, Australia · Girls10 shared years, 1969–1978
Cassandra held the stronger position in 5 of those years, Sonia in 5.
Highest recorded here: Cassandra #55 in 1974, Sonia #50 in 1972.
The order changed in 1974: Cassandra moved ahead. In 1973 they stood at #80 and #55; by 1974 that had become #55 and #63.
Most recent shared year, 1978: Cassandra #65, Sonia #97.
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.
Where to go next
Comparisons that share a name, a rule or a published list with this one. Each is an existing comparison page with its own evidence — nothing here says these pairs are alike.
Other comparisons involving Cassandra
Pairs where Cassandra shares a published list with another name, each measured inside one registrar's own list.
- Hayley vs Cassandra
Across 21 shared years in New South Wales, Australia · Girls, Hayley and Cassandra averaged 10.2 places apart, ending at #31 and #90.
Hayley · Cassandra · 21 shared years, 1979–1999 · Closest over the longest run
- Jasmine vs Cassandra
In New South Wales, Australia · Girls, Jasmine moved into the top 50 at #30 in 1996 as Cassandra fell out of it to #51, having been #34 the year before.
Jasmine · Cassandra · 15 shared years, 1982–1999 · One took the other's place near the top
- Zoe vs Cassandra
In New South Wales, Australia · Girls, Zoe moved into the top 50 at #31 in 1996 as Cassandra fell out of it to #51, having been #34 the year before.
Zoe · Cassandra · 18 shared years, 1981–1999 · One took the other's place near the top
- Kylie vs Cassandra
In New South Wales, Australia · Girls, Cassandra moved into the top 50 at #34 in 1989 as Kylie fell out of it to #82, having been #23 the year before.
Kylie · Cassandra · 21 shared years, 1969–1989 · One took the other's place near the top
Side by side
| Field | Cassandra | Sonia |
|---|---|---|
| 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 | ||
| Syllables | 3 | 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, IE, NO, NZ |
| Most recent popularity observation | Norway · Girls #340 (2025) | Norway · Girls #421 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 70/100 | 94/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Cassandra has 3 syllables, compared with 2 for Sonia.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, IE, NO, NZ.
How each name got here
Cassandra
Popularity journey
First recorded1969
First recorded at #99 among girls in New South Wales, Australia in 1969 — the earliest year that source publishes this name, not necessarily the earliest it was used.
New South Wales, Australia · Girls
Highest recorded1969–1999
Highest recorded position: #25 among girls in New South Wales, Australia, in 1992 (recorded 1969–1999).
New South Wales, Australia · Girls
Most recent2025
Most recently recorded at #340 among girls in Norway, in 2025.
Norway · Girls
Sonia
Popularity journey
First recorded1953
First recorded at #437 among girls in Norway in 1953 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Girls
Highest recorded1967–1978
Highest recorded position: #50 among girls in New South Wales, Australia, in 1972 (recorded 1967–1978).
New South Wales, Australia · Girls
Most recent2025
Most recently recorded at #421 among girls in Norway, in 2025.
Norway · Girls