Magontĭăcum, i, n.,
a city of Germany, on the Rhine , the modern Mayence , Tac. H. 4, 15; 24 sq.; called Mogontĭăcum , Eutr. 7, 8; 9, 7; Magontĭăcus , i, f., Amm. 15, 11, 8; and Maguntia , ae, f., Venant. Fort. Carm. 9, 9, 1.
MAGONTIACUM[MOGANTIACUM.] ...
Dictionary of Greek and Roman Geography