Surname Treija (Treija 
) , across the world, is a rare family name. The family name Treija is characteristic of Northern Europe, particularly Latvia, where it is quite a common surname, Estonia, where it is a rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Treija | Latvia, Estonia, United Kingdom |
|
dace treija-masī Latvian diplomat, LV |
|
| aldona treija LV (b. 1937) |
|