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 | Germany, Philippines, United Kingdom, United States, Mexico |
| هايدي | Iraq, Egypt, Libya, Sudan, Syria |
| Hyde | Australia, Philippines, United Kingdom, United States, Mexico |
| Haydy | Germany, South Africa, Philippines, United States, Mexico |