In the world, สายพันธุ์ (Saiphan 
, สายพันธุ์ , Breedon 
) is a rare mostly masculine, but uncommonly female forename. The given name สายพันธุ์ is habitual in Thailand, where it is a very rare principally girly, but scarcely boy's name, India, where it is a very rare mostly masculine, but uncommonly feminine name, and China, where it is an extremely rare male name. More prevalently, สายพันธุ์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Saiphan | India, Brazil, Thailand |
| Saiphant, สายพันธุ์ | Thailand |
| Breedon | United Kingdom, Canada, Australia, Thailand, United States |