Arbia (river), [177].

Ardinghi (family), [80], [125].

Arezzo, [286-292].

Arius, [39].

Arno, passim.

Arrigucci (family), [80], [124].

Arthur, king of Britain, [48].

Ascanius, [10], [12], [16].

Atlas, [4], [5], [6], [7].

Augustus, Octavianus, [17], [31-33].