Cognomen Диер (Dyer 
, Dier , Diyer 
) , all over the world, is a common family name. The surname Диер is habitual in Latin America and the Caribbean, particularly Antigua and Barbuda, where it is quite a common surname, Jamaica, and Dominica (explore the name in all countries). In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Australia. Much less frequently, Диер is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dier, Dyer | Australia, Jamaica, Canada, United States, United Kingdom |
| Diyer | Spain, Mexico, India, United States, Uzbekistan |
| Диер | Belarus, Russia, Kyrgyzstan, Kazakhstan |