Adranodoros was the husband of King Hiero II

Hiero II of Syracuse

Hieron II , king of Syracuse from 270 to 215 BC, was the illegitimate son of a Syracusan noble, Hierocles, who claimed descent from Gelon. He was a former general of Pyrrhus of Epirus and an important figure of the First Punic War....

's daughter Damarata. He was one of fifteen guardians named by Hiero to counsel Hiero's fifteen-year-old grandson and successor, Hieronymos. Adranodoros dismissed the guardians, saying that they were not needed, and became Hieronymos's chief counselor. He encouraged Hieronymos to change the allegiance of Syracuse from Rome

Rome

Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...

 to Carthage

Carthage

Carthage , implying it was a 'new Tyre') is a major urban centre that has existed for nearly 3,000 years on the Gulf of Tunis, developing from a Phoenician colony of the 1st millennium BC...

. Following Hieronymos's assassination in 215 BC, he attempted to seize power but was too ineffectual. He was assassinated in 214 BC by the pro-Roman faction that assassinated Hieronymos.

Source: http://www.math.nyu.edu/~crorres/Archimedes/Family/FamilyIntro.html