Surname แม็คเคย์ (Mackay 
, แม็คเคย์ 
) , worldwide, is a common family name. The cognomen แม็คเคย์ is habitual in Marshall Islands, where it is a common surname, New Zealand, where it is quite a common surname, and Aruba (explore the name in all countries). In absolute terms, it is commonest in the United Kingdom, the United States, and Canada. Much less frequently, แม็คเคย์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mackay | Canada, New Zealand, United States, Australia, United Kingdom |
| แม็คเคย์ | Thailand |