From the martyrology for January 22:
"At Valencia in Spain, while the wicked Dacian was governor, St. Vincent, deacon and martyr, who, after suffering imprisonment, hunger, the rack, and the disjointing of his limbs, was burned with plates of heated metal and on the gridiron, and tormented in other ways, then took his flight to heaven, there to receive the reward of martyrdom. His noble triumph over his sufferings has been skillfully set forth in verse by Prudentius, and also was eulogized by St. Augustine and Pope St. Leo."
You can read more about him here.
Also in the martyrology today, St Anastasius, a convert martyred in 628:
"At Bethsaloen in Assyria, St. Anastasius, a Persian monk, who after suffering much at Caesarea in Palestine from imprisonment, stripes, and fetters, had to bear many afflictions from Chosroes, king of Persia, who caused him to be beheaded. He had sent before him to martyrdom seventy of his companions, who were drowned in a river. His head was brought to Rome, at Aquae Salviae, together with his revered image, by the sight of which demons are expelled, and diseases cured, as is attested by the Acts of the second Council of Nicea."