All around the world, Geroncio (Geroncio 
) is quite a rare masculine forename. The forename Geroncio is habitual in Philippines, where it is a rare male name, Brazil, and Peru. Much less frequently, Geroncio is the last name as well as the forename.
Maia, Junior, Vieira, Farias, Moreira, Santana, Almeida, Andrade, Cardoso, Barbosa, Batista, Pereira, Ribeiro, Freitas, Fonseca, Queiroz, Medeiros, Carvalho, Castillo, Teixeira, Ferreira, Oliveira, Garcia, Dantas, Barros, Araujo, Melo, Cruz, Dias, Lima, Neto, Hora, Matos, Moura, Silva, Sousa, Rodrigues, Souza, Costa, Brito, Rocha, Gomes, Lopes, Nunes, Filho, Morais, Moraes, Santos, Alves, and Nascimento