Family name ซีเนียร์ (Sinia 
, ซีเนียร์ 
) , worldwide, is quite a rare surname. The family name ซีเนียร์ is characteristic of Honduras, where it is quite a common surname, Nicaragua, where it is quite a rare surname, and Belgium, where it is a rare surname. In absolute terms, the name is most common in Latin America and the Caribbean, particularly Honduras, Nicaragua, and Mexico. Also, ซีเนียร์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sinia | Philippines, Nicaragua, India, Honduras, El Salvador |
| ซีเนียร์ | Thailand |