Moneta
In Roman mythology, Moneta was a title given to two separate goddesses: It was the name of the goddess of memory, and it was an epithet of Juno, called Juno Moneta. The latter's name is the source of numerous words in English and the Romance languages, including “money" and "mint".
The cult of the goddess Moneta was established largely under the influence of Greek religion, which featured the cult of Mnemosyne, the goddess of memory and the mother of the Muses. The goddess's name is derived from Latin monēre. She is mentioned in a fragment of Livius Andronicus' Latin Odyssey: Nam diva Monetas filia docuit, which may be the equivalent of either Od. 8,480-1 or 488.
The epithet Moneta that was given to Juno, in contrast, is more likely to have derived from the Greek word "moneres", meaning "alone”, or “unique". By the time Andronicus was writing, the folk etymology of monēre was widely accepted, and so he could plausibly transmute this epithet into a reference to separate goddess - the literary counterpart of the Greek Mnemosyne.
Juno Moneta and Hyginus' Moneta
Juno Moneta, an epithet of Juno, was the protectress of funds, and, accordingly, money in ancient Rome was coined in her temple. The word "moneta" was used by writers such as Ovid, Martial, Juvenal, and Cicero. In several modern languages, including Russian and Italian, moneta is the word for "coin".Juno Moneta's name is derived either from the Latin monēre or, more likely, from the Greek "moneres", meaning "alone” or “unique".
According to the Suda, a Byzantine encyclopedia, she was called Moneta because when the Romans needed money during the wars against Pyrrhus and Taranto, they prayed to Hera, and she replied to them that, if they would hold out against the enemies with justice, they would not go short of money. After the wars, the Romans honoured Hera Moneta, and, accordingly, decided to stamp the coinage in her temple.
Hyginus in his Fabulae, writes of Moneta as a Titaness daughter of Aether and Tellus, and as the mother by Jove of the nine Muses. Hyginus doesn't seem to identify Moneta with either Juno or Mnemosyne, as the latter is later called a daughter of Jove and Clymene.