Sibling names for Cleo
Names that sound like they belong in the same family as Cleo usually share its era. These sister and brother names rose and fell on a similar curve to Cleo, whose busiest decade was the 1920s, and are about as common, so neither child's name will feel dated or unusual next to the other.
Sister names for Cleo
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| Beatrice | she who makes happy | #508 | 2,705 | 1920s |
| Philomena | #1,920 | 452 | 1920s | |
| Odessa | #1,197 | 676 | 1920s | |
| Vera | #205 | 6,819 | 1920s | |
| Aline | #3,464 | 193 | 1920s | |
| Adele | noble (from Germanic adal) | #751 | 1,733 | 1920s |
| Eunice | "good victory" | #2,362 | 466 | 1920s |
| Leona | lion | #429 | 3,123 | 1920s |
| Ruby | ruby (the red gemstone) | #64 | 17,671 | 1920s |
Brother names for Cleo
Cleo's era
Cleo ranked #577 for girls in 2025, against #1,744 in 2015. Its best year was 1907, at #171. 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, Cleo included.
Girls: Elizabeth, Maria, Lydia, Julia, Miriam, Nina. Boys: Samuel, Anthony, Wesley, Vincent, Victor, Oscar.
Same era, but close to Cleo
These names follow Cleo's curve too, but we left them out above because they share a first letter or an ending with Cleo. Some parents like that echo; if you do, start here.
- Cyril same first letter as Cleo
How these were chosen
Each suggestion's share of US babies has followed a curve close to Cleo's since 1880, and its recent number of babies is within about twelve times Cleo's, so the names are in the same league. Names starting with the same letter as Cleo or with the same ending are left out, so the names go together without matching. Spellings of Cleo itself are excluded.