In all the world, Ketlyn (Ketlyn 
) is quite a common feminine first name. The first name Ketlyn is habitual in Brazil, where it is quite a rare feminine name, and Portugal, where it is a very rare feminine name.
Melo, Marques, Machado, Moreira, Santana, Almeida, Andrade, Cardoso, Camargo, Barbosa, Batista, Pereira, Ribeiro, Freitas, Silveira, Carvalho, Cristina, Teixeira, Ferreira, Oliveira, Rodrigues, Goncalves, Martins, Vieira, Borges, Castro, Cruz, Rosa, Reis, Dias, Lima, Moura, Silva, Sousa, Souza, Alves, Fernandes, Costa, Ramos, Rocha, Gomes, Lopes, Jesus, Nunes, Moraes, Santos, Soares, Araujo, Paula, and Nascimento