Family name เทย์ (Teiy 
, เทย์ ) , in the entire world, is an extremely rare last name. The cognomen เทย์ is habitual in Northern America, particularly Canada, where it is a very rare surname. More prevalently, เทย์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Teiy | Thailand, United States, Canada, Philippines |
| เทย์ | Thailand |