Family name ローイ (Looi 
, Loewy 
, Looy 
) , across the world, is a common surname. The last name ローイ is habitual in Malaysia, where it is quite a common surname, Singapore, and Belgium (explore the name in all countries). Much less frequently, ローイ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Looi | Indonesia, Malaysia, Singapore, United States, Netherlands |
| Loewy | Indonesia, Australia, United States, Canada, Netherlands |
| Looy | Belgium, Malaysia, Singapore, United States, Netherlands |