Caius Geminius Apseustus was possibly a freedman of a Roman named Caius Geminius, with the cognomen Apseustus having been his slave-name. His wife, Geminia Chrysis, was probably his own slave, originally named Chrysis, whom he married after granting her her freedom, hence the reference in the text to her patronus. The cognomen Apseustus is uncommon and is likely to have originated from the eastern Mediterranean region or Asia Minor.