Caesar's Adopted Son and Successor in the Play

This page is the CodyCross answer for the clue below from All Things Water, Group 1300, Puzzle 2 (Mediterranean Sea).

Question is: Caesar's Adopted Son and Successor in the Play

and the answer is: OCTAVIUS

Word Meaning:

OCTAVIUS — (historical) Alternative form of octarius (the pint (eighth of a gallon) in the apothecaries' system)

Definitions from Wiktionary.