Family name ダイヤ (Dyer 
, ダイヤ 
) , around the globe, is a common surname. The surname ダイヤ is characteristic of 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 is commonest in the United States, the United Kingdom, and Australia. Much less frequently, ダイヤ is the forename as well as the last name.