AGINNUM or AGENNUM(Agen), was the chief town of the Nitiobriges, a tribe situated between the Garumna and the Ligeris in Caesar's time ( B. G. 7.7, 75). Aginnum was on the road from Burdigala to Argentomagus (It. Antonin.). It is the origin of the modern town of Agen, on the river Garonne, in the department of Lot and Garonne, and contains some Roman remains. Aginnum is mentioned by Ausonius ( Ep. 24.79); and it was the birthplace of Sulpicius Severus.
[G.L]