Sibling names for Thomas
Names that sound like they belong in the same family as Thomas usually share its era. These sister and brother names rose and fell on a similar curve to Thomas, 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 Thomas
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| Katherine | #186 | 8,684 | 1980s | |
| Elizabeth | 'my God is an oath' | #17 | 34,585 | 1980s |
| Jane | God is gracious (feminine of John) | #221 | 5,943 | 1950s |
| Mary | #125 | 10,755 | 1920s | |
| Laura | laurel | #379 | 4,204 | 1960s |
| Margaret | pearl | #112 | 11,281 | 1920s |
| Rose | rose (flower); originally Germanic 'fame' + 'kind' | #114 | 11,807 | 1920s |
| Alice | noble kind | #65 | 17,447 | 1920s |
Brother names for Thomas
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| James | English form of Jacob | #6 | 60,133 | 1950s |
| Peter | rock, stone | #187 | 9,161 | 1950s |
| Philip | fond of horses | #528 | 3,055 | 1950s |
| John | 'God is gracious' (Hebrew Yohanan) | #23 | 40,105 | 1950s |
| Charles | man, free man | #48 | 28,876 | 1940s |
| Paul | small, humble | #262 | 6,724 | 1950s |
| Robert | bright fame | #92 | 19,923 | 1950s |
| Joseph | 'God will add / increase' | #29 | 37,848 | 1980s |
| William | will + helmet (Germanic) | #9 | 55,391 | 1950s |
| Edward | wealthy guardian | #224 | 8,418 | 1920s |
| Richard | strong ruler | #234 | 8,165 | 1950s |
Thomas's era
Thomas ranked #34 for boys in 2025, against #51 in 2015. Its best year was 1880, at #8. 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, Thomas included.
Girls: Elizabeth, Maria, Lydia, Cecilia, Julia, Miriam. Boys: Samuel, Anthony, Wesley, Vincent, Calvin, Victor.
How these were chosen
Each suggestion's share of US babies has followed a curve close to Thomas's since 1880, and its recent number of babies is within about twelve times Thomas's, so the names are in the same league. Names starting with the same letter as Thomas or with the same ending are left out, so the names go together without matching. Spellings of Thomas itself are excluded.