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Last name เซอร์ (Sir
, เซอร์
, Sirilest
) , worldwide, is a common cognomen. The cognomen เซอร์ is habitual in Bhutan, where it is quite a common surname, Maldives, and Taiwan, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Bangladesh, China, and Nepal. Much less frequently, เซอร์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sir | Bangladesh, Nepal, Taiwan, Sri Lanka, China |
| Sirilest, เซอร์, Sirilers | Thailand |