Spellings
Heidi or Heidy?
In the US in 2025, 90% of babies in this name family were spelled Heidi and 10% Heidy. Same name, slightly different impression: here are the figures for each spelling.
Ten years ago
Heidi already led in 2015, with 88% of the family's births; it has 90% in 2025. All spellings together, the family went from 1,089 to 995 births (−9%).
| Spelling | 2015 | 2025 | Change |
|---|---|---|---|
| Heidi | 955 | 894 | −6% |
| Heidy | 134 | 101 | −25% |
How they sound
All of these spellings are said the same way: /ˈhaɪdi/ (HY-dee). 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: Heidi 20 births and Heidy 5 births.
Sources: Social Security Administration (SSA), Insee (France), 2025 data. How we calculate these figures.
Which spelling is yours?
The one-minute style quiz.