Cities Zaragoza[1], Spain, and Siracusa[2], Italy are apparently not the toponymic homonyms. Only one was named after Emperor Gaius Julius Caesar Augustus[3] (Gaius Octavius).

[1] → https://en.wikipedia.org/wiki/Zaragoza
[2] → https://en.wikipedia.org/wiki/Syracuse,_Sicily
[3] → https://en.wikipedia.org/wiki/Augustus