Cognomen Seui-Matagi (Seui-Matagi 
) , in the entire world, is an extremely rare family name. The surname Seui-Matagi is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Seui, and a first name Matagi.
| VARIANT | COUNTRY |
|---|---|
| Seui-Matagi | United States |