Sibling names for Billy
Names that sound like they belong in the same family as Billy usually share its era. These sister and brother names rose and fell on a similar curve to Billy, whose busiest decade was the 1930s, and are about as common, so neither child's name will feel dated or unusual next to the other.
Sister names for Billy
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| Dolores | sorrows (Our Lady of Sorrows) | #2,567 | 320 | 1930s |
| Marilyn | #761 | 2,002 | 1940s | |
| Arlene | 19th-century coinage | #1,632 | 585 | 1930s |
| Joyce | lord (Breton, via Josse) | #1,074 | 1,247 | 1940s |
| Gloria | glory (Latin) | #655 | 2,327 | 1940s |
| Joanne | from Joanna, or Jo + Anne | #2,630 | 355 | 1950s |
| Norma | #2,012 | 439 | 1930s | |
| Shirley | bright clearing; shire meadow | #1,586 | 662 | 1930s |
| Elaine | Old French form of Helen | #305 | 3,996 | 1940s |
Brother names for Billy
| Name | Meaning | Rank 2025 | Babies, last 5 years | Peak decade |
|---|---|---|---|---|
| Gene | short form of Eugene, 'well born' | #2,238 | 377 | 1930s |
| Donald | world ruler (Gaelic) | #690 | 2,089 | 1930s |
| Don | short form of Donald, 'world ruler' | #1,795 | 492 | 1940s |
| Gerald | spear rule | #1,206 | 982 | 1940s |
| Duane | variant of Duane; "dark" | #2,578 | 345 | 1950s |
| Jimmy | pet form of James | #847 | 1,536 | 1940s |
| Richard | strong ruler | #234 | 8,165 | 1950s |
| Jerome | sacred name | #1,257 | 859 | 1950s |
| Wayne | wagon maker (English surname) | #655 | 1,824 | 1950s |
| Marvin | #699 | 2,134 | 1930s | |
| Kenneth | #294 | 6,344 | 1950s |
Billy's era
Billy ranked #1,068 for boys in 2025, against #810 in 2015. Its best year was 1931, at #19. 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, Billy included.
Girls: Elizabeth, Maria, Lydia, Cecilia, Julia, Miriam. Boys: Samuel, Anthony, Wesley, Vincent, Calvin, Victor.
Same era, but close to Billy
These names follow Billy's curve too, but we left them out above because they share a first letter or an ending with Billy. 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 Billy's since 1880, and its recent number of babies is within about twelve times Billy's, so the names are in the same league. Names starting with the same letter as Billy or with the same ending are left out, so the names go together without matching. Spellings of Billy itself are excluded.