Cognomen لاجان (Lagan 
, لاجان 
) , worldwide, is a common surname. The cognomen لاجان is characteristic of Mauritius, where it is quite a rare surname, Ireland, and Philippines. In absolute terms, it is the most numerous in India, Philippines, and the United Kingdom. More frequently, لاجان is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lagan | United Kingdom, Poland, United States, India, Philippines |
| لاجان | Iraq |