Cognomen هايدي (Heidi 
, هايدي 
, Hyde 
) , globally, is a common family name. The cognomen هايدي is characteristic of Belize, where it is a common surname, Guernsey, where it is quite a common surname, and Jamaica (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Mexico. More prevalently, هايدي is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Heidi | United Kingdom, Germany, Mexico, United States, Philippines |
| هايدي | Syria, Egypt, Sudan, Libya, Iraq |
| Hyde | United Kingdom, Australia, Mexico, United States, Philippines |
| Haydy | Germany, South Africa, Mexico, United States, Philippines |