Spellings
Silas or Sylas?
In the US in 2025, 86% of babies in this name family were spelled Silas and 13% Sylas. Same name, slightly different impression: here are the figures for each spelling.
Ten years ago
Silas already led in 2015, with 86% of the family's births; it has 86% in 2025. All spellings together, the family went from 3,707 to 5,421 births (+46%).
| Spelling | 2015 | 2025 | Change |
|---|---|---|---|
| Silas | 3,191 | 4,639 | +45% |
| Sylas | 439 | 717 | +63% |
| Cylas | 77 | 65 | −16% |
How they sound
All of these spellings are said the same way: /ˈsaɪləs/ (SY-lus). So the choice is about how it looks: it is the spelling people will read on a birth card, a name tag or an email address, and the one your child will sometimes spell out.
In France
In France in 2025: Silas 75 births (#564 among boys) and Sylas 20 births. The other spellings are not given there often enough to be counted.
Sources: Social Security Administration (SSA), Insee (France), 2025 data. How we calculate these figures.
Which spelling is yours?
The one-minute style quiz.