In Roman mythology, Aequitas, also known as Aecetia, was the goddess of fair trade and honest merchants. Like Abundantia, she is depicted with a cornucopia,
representing wealth from commerce. She is also shown holding a balance,
representing equity and fairness. During the Roman Empire, Aequitas was sometimes worshipped as a quality or aspect of the emperor, under the name Aequitas Augusti.
Aequitas is the tattoo that one brother has in the film
The Boondock Saints. His brother has a tattoo of the word Veritas. They represent justice/equality/balance/fairness and truth.
Aequitas is the source of the word equity, and also means "equality" or "justice".