Sibling names for Robert
Names that sound like they belong in the same family as Robert usually share its era. These sister and brother names rose and fell on a similar curve to Robert, whose busiest decade was the 1950s, and are about as common, so neither child's name will feel dated or unusual next to the other.
Sister names for Robert
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| Virginia | feminine of the Roman family name Verginius | #526 | 2,849 | 1920s |
| Mary | #125 | 10,755 | 1920s | |
| Gloria | glory (Latin) | #655 | 2,327 | 1940s |
| Martha | the lady, mistress (Aramaic) | #713 | 2,067 | 1940s |
| Margaret | pearl | #112 | 11,281 | 1920s |
| Frances | Frenchwoman (feminine of Francis) | #318 | 4,105 | 1920s |
| Elizabeth | 'my God is an oath' | #17 | 34,585 | 1980s |
Brother names for Robert
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| Paul | small, humble | #262 | 6,724 | 1950s |
| James | English form of Jacob | #6 | 60,133 | 1950s |
| Kenneth | #294 | 6,344 | 1950s | |
| Thomas | twin | #34 | 33,330 | 1950s |
| Donald | world ruler (Gaelic) | #690 | 2,089 | 1930s |
| Charles | man, free man | #48 | 28,876 | 1940s |
| Joseph | 'God will add / increase' | #29 | 37,848 | 1980s |
| John | 'God is gracious' (Hebrew Yohanan) | #23 | 40,105 | 1950s |
| Edward | wealthy guardian | #224 | 8,418 | 1920s |
Robert's era
Robert ranked #92 for boys in 2025, against #63 in 2015. Its best year was 1924, at #1. A sibling name from the same wave will sound like it was chosen by the same parents; a name from an older or newer wave can make one child's name feel dated next to the other's.
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, Robert included.
Girls: Elizabeth, Maria, Lydia, Cecilia, Julia, Miriam. Boys: Samuel, Anthony, Wesley, Vincent, Calvin, Victor.
Same era, but close to Robert
These names follow Robert's curve too, but we left them out above because they share a first letter or an ending with Robert. 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 Robert's since 1880, and its recent number of babies is within about twelve times Robert's, so the names are in the same league. Names starting with the same letter as Robert or with the same ending are left out, so the names go together without matching. Spellings of Robert itself are excluded.