Globally, Ercilia (Ercilia 
) is a common girly first name. The first name Ercilia is characteristic of Latin America and the Caribbean, particularly Argentina, where it is quite a common feminine name, Brazil, where it is quite a rare girly name, and Nicaragua. Not in comparison with a country's population, it is commonest in Latin America and the Caribbean, particularly Brazil, Argentina, and Mexico. Much less frequently, Ercilia is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Ercilia | Peru, Argentina, Brazil, Mexico, Honduras |
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ercilia pepín Dominican Republic activist (1886-1939), DO (b. 1886) |
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ercilia guidali UY (b. 1881) |
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| ercilia lópez de blomberg Paraguayan writer, PY (b. 1865) |
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| ercilia porfirio de freitas person identified in the Museu da Pessoa collection, BR (b. 1946) |
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| ercilia cristina sousa D.Phil. University of Oxford 2001 |
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| ercilia sarmento Brazilian woman, BR |
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| ercilia cabral pereira Peerage person ID=104196 |
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Cruz, Martins, Machado, Moreira, Miranda, Santana, Almeida, Andrade, Cardoso, Barbosa, Pereira, Ribeiro, Freitas, Martinez, Carvalho, Gonzalez, Ferreira, Oliveira, Conceicao, Rodriguez, Rodrigues, Goncalves, Vieira, Garcia, Campos, Castro, Rosa, Reis, Diaz, Dias, Lima, Silva, Sousa, Souza, Alves, Costa, Fernandes, Paula, Ramos, Rocha, Gomez, Gomes, Lopez, Lopes, Jesus, Santos, Soares, Araujo, Perez, and Nascimento