Last name ไข่มุกข์ (Pearl 
, Kaimook 
, ไข่มุกข์) , worldwide, is a common family name. The family name ไข่มุกข์ is habitual in Israel, where it is quite a common surname, Botswana, and Brunei, where it is quite a rare surname. In absolute terms, it is the most numerous in the United States, Myanmar, and Israel. More frequently, ไข่มุกข์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pearl | Myanmar, South Africa, United Kingdom, United States, Ghana |
| Kaimook | United States, Thailand |