Ataulf (ăt´āəlf), d. 415, Visigothic king (410–15). Succeeding his brother-in-law, Alaric I, he abandoned Alaric's scheme of southward expansion and led the Visigoths out of Italy into S Gaul (France) in 412. He sought the alliance of the Western emperor, Honorius, whose sister Galla Placidia he married in 414. However, the general Constantius (later Emperor Constantius III), jealous of Ataulf, turned Honorius against him. Constantius blockaded the Gallic ports, and Ataulf, cut off from supplies, led his people into N Spain (see Visigoths). He was assassinated at Barcelona.