Surname Llucas (Llucas 
) , throughout the world, is a very rare family name. The cognomen Llucas is characteristic of Latin America and the Caribbean, particularly Argentina, where it is a very rare surname, Mexico, where it is an extremely rare surname, and Brazil. Also, Llucas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Llucas | South Africa, Argentina, Brazil, United States, Mexico |