ograph er , ▁ 2 nd ▁or ▁ 3 rd ▁century ▁ ▁D ion ys ius ▁the ▁Ren eg ade , ▁Sto ic ▁phil os opher ▁from ▁Her acle a ▁who ▁became ▁a ▁Cy ren a ic , ▁c . ▁ 3 0 0 ▁BC ▁ ▁Let ters ▁▁ ▁Cass ius ▁D ion ys ius , ▁ 2 nd ▁cent . ▁BC , ▁Greek ▁agricult ural ▁writer ▁ ▁A el ius ▁D ion ys ius , ▁a ▁Greek ▁r het or ician ▁from ▁Hal ic arn ass us ▁( fl . ▁early ▁ 2 nd ▁century ) ▁ ▁D ion ys ius ▁Chal cus , ▁A then ian ▁eleg iac ▁poet , ▁ 5 th ▁century ▁BC ▁ ▁D ion ys ius ▁of ▁Hal ic arn ass us ▁( c . ▁ 6 0 ▁BC ▁– ▁after ▁ 7 ▁BC ), ▁Greek ▁historian ▁of ▁the ▁Roman ▁period ▁ ▁D ion ys ius ▁Th ra x , ▁Greek ▁grammar ian , ▁ 2 nd ▁century ▁BC ▁ ▁Polit ics ▁▁ ▁D ion ▁of ▁Sy rac use , ▁ 4 0 8 - 3 5 4 ▁BC , ▁t yr ant ▁of ▁Sy rac use ▁ ▁D ion ys ius ▁( amb assador ), ▁ 3 rd ▁century ▁BC , ▁amb assador ▁to ▁the ▁court ▁of ▁the ▁Indian ▁r uler ▁Ash oka ▁ ▁D ion ys ius ▁( A then ian ▁Commander ), ▁an ▁A then ian ▁naval ▁commander ▁during ▁the ▁Cor inth ian ▁War ▁ ▁D ion ys ius ▁I ▁of ▁Sy rac use