Sibling names for Dennis
Names that sound like they belong in the same family as Dennis usually share its era. These sister and brother names rose and fell on a similar curve to Dennis, 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 Dennis
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| Kathleen | Irish form of Catherine | #1,156 | 1,162 | 1950s |
| Sharon | the Sharon plain | #1,256 | 934 | 1950s |
| Sandra | short form of Alexandra | #1,210 | 1,155 | 1940s |
| Marcia | feminine of Marcius (from Mars) | #3,434 | 188 | 1950s |
| Linda | gentle, tender (Germanic) | #902 | 1,622 | 1950s |
| Connie | pet form of Constance | #3,075 | 245 | 1950s |
| Janice | variant of Jane | #2,522 | 428 | 1950s |
| Charlene | feminine of Charles (19th-century coinage) | #1,948 | 541 | 1950s |
| Susan | lily (from Susanna) | #1,091 | 1,099 | 1950s |
Brother names for Dennis
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| Gary | spear (from names in Gar-/Ger-) | #1,073 | 1,081 | 1950s |
| Ronnie | pet form of Ronald or Veronica | #1,067 | 1,057 | 1950s |
| Bruce | #536 | 2,735 | 1950s | |
| Terry | from Thierry (Theodoric); or short for Terence, Theresa | #1,116 | 1,015 | 1950s |
| Roger | famous spear (Germanic) | #834 | 1,712 | 1950s |
| Johnny | pet form of John ('God is gracious') | #458 | 3,605 | 1950s |
| Ronald | ruler with counsel (Norse, via Scottish Gaelic) | #638 | 2,429 | 1940s |
| Alan | #191 | 10,204 | 1950s | |
| Tommy | pet form of Thomas, 'twin' | #658 | 1,876 | 1940s |
| Wayne | wagon maker (English surname) | #655 | 1,824 | 1950s |
Dennis's era
Dennis ranked #707 for boys in 2025, against #494 in 2015. Its best year was 1949, at #16. 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, Dennis included.
Girls: Elizabeth, Maria, Lydia, Cecilia, Julia, Miriam. Boys: Samuel, Anthony, Wesley, Vincent, Calvin, Victor.
Same era, but close to Dennis
These names follow Dennis's curve too, but we left them out above because they share a first letter or an ending with Dennis. 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 Dennis's since 1880, and its recent number of babies is within about twelve times Dennis's, so the names are in the same league. Names starting with the same letter as Dennis or with the same ending are left out, so the names go together without matching. Spellings of Dennis itself are excluded.