Cassidy vs Sinead
Cassidy and Sineadcompared 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.
Northern Ireland · Girls
In 2016, Cassidy was ranked #440 and Sinead #251 among girls in Northern Ireland.
England and Wales · Girls
In 2025, Cassidy was ranked #807 and Sinead #3333 among girls in England and Wales.
Republic of Ireland · Girls
In 2022, Cassidy was ranked #905 and Sinead #905 among girls in Republic of Ireland.
Cassidy and Sinead over time
Cassidy and Sinead appear together in 2 published lists, across 40 years of shared records. Sinead held the stronger position in more years in 2 of them, Cassidy 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.
Sinead reached its own highest recorded position earlier in 2 of those lists, and Cassidy 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.
- Longest-running competitions
Cassidy and Sinead were both ranked in England and Wales · Girls for 30 years, from 1996 to 2025, ending at #807 and #3333.
- Peaked in the same years
Both reached their highest recorded position in Republic of Ireland · Girls within 2 years — Cassidy #465 in 2000, Sinead #26 in 1999.
List by list
England and Wales · Girls30 shared years, 1996–2025
Cassidy held the stronger position in 12 of those years, Sinead in 18.
Highest recorded here: Cassidy #580 in 2006, Sinead #154 in 2003.
The order changed in 2015: Cassidy moved ahead. In 2014 they stood at #763 and #715; by 2015 that had become #686 and #722.
Most recent shared year, 2025: Cassidy #807, Sinead #3333.
Republic of Ireland · Girls10 shared years, 1999–2022
Cassidy held the stronger position in 0 of those years, Sinead in 8.
Highest recorded here: Cassidy #465 in 2000, Sinead #26 in 1999.
The order between them never changed and held in this list.
Most recent shared year, 2022: Cassidy #905, Sinead #905.
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 | Cassidy | Sinead |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | Used for both boys and girls | female |
| Meaning | Not yet recorded | Irish form of Jeannette/Janet; the underlying chain traces to the Hebrew name Yochanan, commonly interpreted as 'God is gracious'. |
| Origin | Not yet recorded | Irish, via Anglo-Norman French Jeannette |
| Pronunciation | Not yet recorded | /ˈʃɪnʲeːdˠ/ |
| Syllables | 3 | 2 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | GB-ENW, GB-NIR, GB-SCT, IE | GB-ENW, GB-NIR, IE, NZ |
| Most recent popularity observation | Republic of Ireland · Girls #718 (2025) | England and Wales · Girls #3333 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 82/100 | 88/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Sinead has a recorded origin (Irish, via Anglo-Norman French Jeannette); Cassidy does not have one recorded yet.
- Cassidy has 3 syllables, compared with 2 for Sinead.
- A meaning is recorded for Sinead; Cassidy doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, IE.
How each name got here
Cassidy
Popularity journey
First recorded1996
First recorded at #1168 among girls in England and Wales in 1996 — the earliest year that source publishes this name, not necessarily the earliest it was used.
England and Wales · Girls
Highest recorded2005–2024
Highest recorded position: #370 among girls in Northern Ireland, in 2008 (recorded 2005–2024).
Northern Ireland · Girls
Most recent2025
Most recently recorded at #807 among girls in England and Wales, in 2025.
England and Wales · Girls
Sinead
Popularity journey
First recorded1964
First recorded at #109 among girls in Republic of Ireland in 1964 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Girls
Highest recorded1964–2022
Highest recorded position: #2 among girls in Republic of Ireland, in 1975 (recorded 1964–2022).
Republic of Ireland · Girls
Most recent2025
Most recently recorded at #3333 among girls in England and Wales, in 2025.
England and Wales · Girls