Diodorus wrote that he was born at Agyrium in Sicily (now called Agira). There is only two other references to Diodorus. One is by Jerome, in his "Chronicon" from 49 BC, who wrote that "Diodorus of Sicily, a writer of Greek history, became illustrious". There is also a Greek inscription in the collection of the Agyrium (Inscriptiones Graecae XIV, 588) about the tombstone of one "Diodorus, the son of Apollonius". (This may be a different person).