Last name Nelsi (Nelsi 
) , across the world, is quite a rare surname. The cognomen Nelsi is characteristic of Latin America and the Caribbean, particularly Honduras, where it is quite a rare surname, Venezuela, and Mexico, where it is a rare surname. More frequently, Nelsi is the forename as well as the last name.
Cruz, Moreira, Sanchez, Scherer, Schmidt, Almeida, Cardoso, Pereira, Ribeiro, Freitas, Martinez, Silveira, Carvalho, Gonzalez, Hoffmann, Ferreira, Oliveira, Schneider, Rodriguez, Rodrigues, Goncalves, Hernandez, Machado, Martins, Flores, Vieira, Rosa, Diaz, Dias, Lima, Silva, Souza, Alves, Costa, Perez, Ramos, Barrientos, Rocha, Lopez, Lopes, Weber, Muller, Santos, Soares, Castro, Correa, Garcia, Vargas, Gomes, and Nascimento