Meaning and history
Justy is an English diminutive or informal form of names such as Justin, Justine, and Justina. These names derive from Latin iustus, meaning “just,” “fair,” or “righteous.” Justin was borne by several early saints, including the second-century Christian philosopher Justin Martyr, while Justina has its own saintly tradition. Because Justy can shorten either masculine or feminine forms, its gender and exact full-name source depend on the bearer. Prominent exact-name examples are limited.