Peitho

Peitho was a minor goddess in the Pantheon, governing the art of persuasion. She was chiefly thought to be the daughter of two of the Titans, Tethys and Okeanos, (Hesiod, the Theogony) and therefore the sister of Tyche, Metis and Calypso. Other sources consider Ate, Promethus and Aphrodite to be part of her parentage. She was a handmaiden of Aphrodite and to some extent has had her persona merged with that more powerful goddess. Her art was of particular use when the original Athenian democracy was created, enabling orators to persuade each other to understanding instead of physical conflict. Some of her history is darker though, where she has been identified with forceful unions within and without marriage, hence her attributes of a white dove and binding twine.

The Roman version of this goddess was known as Suada (or Suadela) from which we get the word "persuasion".

She is not known to appear specificially on any Roman coins though she may have appeared as a Janus-headed goddess on early Athenian coins.