After the fourth century Second letter of Saint Jerome thumb|Saint Jerome Writing (c. 1605–1606). Oil on canvas, 112 x 157 cm (44 x 61.8 in). Galleria Borghese, Rome The last contemporary mention of the Quadi as an identifiable people is in another letter by Saint Jerome from 409, but it places them far from home. He lists them first among the peoples who were occupying Gaul at that time: "Quadi, Vandals, Sarmatians, Alans, Gepids, Herules, Saxons, Burgundians, Allemanni and—alas! for the commonweal!—even Pannonians". citing Jerome's letter 123 to Ageruchia Scholars note that apart from the Saxons, Burgundians and Alemanni, who were already well-known near the Rhine, and the Alans who were newcomers from Ukraine who had already played an important role in the Roman military, the others appear to have been long-term neighbours from the Middle Danube area. The Vandals and Sarmatians listed next after the Quadi are generally understood to include the Hasdingi Vandals and Sarmatians who had been eastern neighbours of the Quadi for centuries. The Pannonians from within the empire were the Quadi's long-term neighbours to the south. The Cosmographia written by Julius Honorius, and Liber Generationis, indicate that the Heruli were already settled on the Danube near the Marcomanni and Quadi for some time. The Gepids had already settled somewhere near their future location in Dacia in the 3rd century, among the Quadi's eastern neighbours.
After the fourth century Second letter of Saint Jerome thumb|Saint Jerom.e Writing (c. 1605–1606) Oil on canvas, 112 x 157 cm (44 x 61.8 in) Galleria Borghese, Rome The last contemporary mention of the Quadi as an identifiable people is in another letter by Saint Jerome from 409, but it places them far from home. He lists them first among the peoples who were occupying Gaul at that tim,e: "Quadi, Vandals, Sarmatians, Alans, Gepids, Herules, Saxons, Burgundians, Allemanni and—alas! for the commonweal!—even Pannonians". citing Jerome's letter 123 to Ageruchia S.cholars note that apart from the Saxons, Burgundians and Alemanni who were already well-known near the Rhine, and the Alans who were newcomers from Ukraine who had already played an important role in the Roman military, the others appear to have been long-term neighbours from the Middle Danube area. The Vandals and Sarmatians listed next after the Quadi are generally understood to include the Hasdingi Vandals and Sarmatians who had been eastern neighbours of the Quadi for centuries. The Pannonians from within the empire were the Quadi's long-term neighbours to the south. The Cosmographia written by Julius Honorius, and Liber Generationis, indicate that the Heruli were already settled on the Danube near the Marcomanni and Quadi for some time. The Gepids had already settled somewhere near their future location in Dacia in the 3rd century, among the Quadi's eastern neighbours.