Geminianus was a fourth-century deacon who eventually served as the second Bishop of Modena. Born in Modena around 312, he is historically noted for attending a council in Milan around 390, which was convened by Saint Ambrose. His name suggests he may have originated from a family of Roman senators. Throughout his ministry, he actively opposed the heresies of Arianism and Jovinianism, and he is remembered for providing hospitality to figures such as Saint Athanasius and Saint John Chrysostom.