Family name Thainna (Thainna 
) , across the world, is an extremely rare surname. The cognomen Thainna is habitual in Latin America and the Caribbean, particularly Brazil, where it is an extremely rare surname. Much more frequently, Thainna is the forename as well as the last name.
Braz, Freire, Martins, Marques, Machado, Santana, Alencar, Almeida, Andrade, Barbosa, Pereira, Ribeiro, Siqueira, Carneiro, Coutinho, Pinheiro, Teixeira, Ferreira, Oliveira, Rodrigues, Goncalves, Fernandes, Vieira, Ghiggi, Garcia, Araujo, Paes, Reis, Dias, Lima, Moura, Silva, Sousa, Souza, Alves, Costa, Cavalcante, Brito, Pinto, Pires, Rocha, Gomes, Lopes, Jesus, Nunes, Mendes, Santos, Simoes, Porto, and Nascimento