Family name Laucy (Laucy 
) , all around the world, is an extremely rare cognomen. The last name Laucy is habitual in Venezuela, where it is an extremely rare surname, Mexico, and the United States. Much more frequently, Laucy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Laucy | Mexico, United States, India, Brazil, Venezuela |
Luz, Marino, Mathew, Monadi, Morais, Mendes, Santos, Sebben, Soares, Claude, Biglia, Rebelo, Duarte, Lucena, Thomas, Tutini, Valera, Mariano, Martins, Almeida, Medeiros, Carvalho, Filho, Feres, Vidal, Neves, Sena, Paim, Rosa, Rose, Reis, Gama, Lima, Moura, Santo, Sales, Ferreira, Saito, Souza, Alves, Carmo, Braga, Brito, Rajan, Rocha, Darly, Gomes, Leite, Silva, and Oliveira