Cognomen Loncarica (Loncarica 
) , in the world, is a very rare last name. The surname Loncarica is habitual in Argentina, where it is a very rare surname, Croatia, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Loncarica | Argentina, Croatia, United States |
| alfredo kohn loncarica Argentine Esperantist, AR (b. 1945) |
|