Family name ลุก (Luk 
, Lyuk 
, ลุก 
) , globally, is a common cognomen. The last name ลุก is habitual in Hong Kong, where it is a common surname, Cayman Islands, and Bermuda, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Hong Kong, China, and the United States. Very seldom, ลุก is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Luk | Belgium, China, United States, India, Hong Kong |
| Lyuk | Russia, United States, Malaysia, India, Bulgaria |
| ลุก | Thailand |