Sibling names for Cassidy
Names that sound like they belong in the same family as Cassidy usually share its era. These sister and brother names rose and fell on a similar curve to Cassidy, whose busiest decade was the 2000s, and are about as common, so neither child's name will feel dated or unusual next to the other.
Sister names for Cassidy
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| Mikayla | who is like God? (variant of Michaela) | #748 | 2,137 | 2000s |
| Yasmin | jasmine | #959 | 1,419 | 2000s |
| Destiny | destiny, fate | #635 | 3,408 | 2000s |
| Kiana | Hawaiian form of Diana; or feminine of Kian | #743 | 1,889 | 1990s |
| Sydney | wide island (English place name) | #348 | 5,380 | 2000s |
| Bryanna | #2,302 | 541 | 2000s | |
| Montana | #1,033 | 986 | 1990s | |
| Alexis | defender, helper | #554 | 3,673 | 2000s |
| Essence | #1,165 | 1,082 | 1990s |
Brother names for Cassidy
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| Tanner | tanner (leather worker) | #475 | 3,765 | 1990s |
| Trevon | #1,583 | 489 | 1990s | |
| Jaquan | #2,294 | 366 | 1990s | |
| Malik | king; owner, master | #437 | 3,917 | 1990s |
| Trey | third (nickname for a III) | #890 | 1,807 | 2000s |
| Dalton | valley settlement | #448 | 3,153 | 1990s |
| Brendan | prince (Welsh word, via Irish) | #1,098 | 1,275 | 1990s |
| Austin | venerable (from Augustine) | #113 | 17,051 | 1990s |
| Devin | #548 | 3,389 | 1990s |
Cassidy's era
Cassidy ranked #541 for girls in 2025, against #257 in 2015. Its best year was 1999, at #99. Names that rose and fell with it share its period feel, which keeps the set consistent.
Timeless names that go with any sibling
These names have been used steadily for a hundred years, so they sit comfortably next to a name from any era, Cassidy included.
Girls: Elizabeth, Maria, Lydia, Julia, Miriam, Nina. Boys: Samuel, Anthony, Wesley, Vincent, Victor, Oscar.
Same era, but close to Cassidy
These names follow Cassidy's curve too, but we left them out above because they share a first letter or an ending with Cassidy. Some parents like that echo; if you do, start here.
How these were chosen
Each suggestion's share of US babies has followed a curve close to Cassidy's since 1880, and its recent number of babies is within about twelve times Cassidy's, so the names are in the same league. Names starting with the same letter as Cassidy or with the same ending are left out, so the names go together without matching. Spellings of Cassidy itself are excluded.