Family name Thomas-Mckoy (Thomas-Mckoy 
) , globally, is an extremely rare cognomen. The surname Thomas-Mckoy is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a first name Thomas, and a last name Mckoy.
| VARIANT | COUNTRY |
|---|---|
| Thomas-Mckoy | United States |