Surname สายรุ้ง (Rainbow 
, Sairung 
, สายรุ้ง) , all over the world, is quite a common cognomen. The family name สายรุ้ง is characteristic of Guernsey, where it is quite a common surname, Isle of Man, where it is quite a rare surname, and Hong Kong. Not in comparison with a country's population, it is commonest in the United Kingdom, Indonesia, and China. Likewise, สายรุ้ง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rainbow | Hong Kong, Thailand, United Kingdom, Indonesia, China |
| Sairung | Thailand, United Kingdom, India, United States, Indonesia |