Thomas Cooper Thesaurus Linguae Romanae et Britannicae

Iaxes,

A riuer of Scythia. Iazyges. People of Metanasta in 'E'urope, on the south part of Germany, called now Septem castra, cõmõly Sibenburgh: it hath on the north. Armatia, on the west and South, Germany and Pannonie inferiour: on the east Dacia.