Spellings
Callum or Calum?
In the US in 2025, 88% of babies in this name family were spelled Callum and 9% Calum. Same name, slightly different impression: here are the figures for each spelling.
Ten years ago
Callum already led in 2015, with 80% of the family's births; it has 88% in 2025. All spellings together, the family went from 464 to 3,422 births (×7).
| Spelling | 2015 | 2025 | Change |
|---|---|---|---|
| Callum | 369 | 2,995 | ×8 |
| Calum | 76 | 313 | ×4 |
| Kallum | 19 | 114 | ×6 |
How they sound
All of these spellings are said the same way: /ˈkæləm/ (KAL-um). 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: Callum 5 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.