Stratonice of Pergamon

Stratonice (Greek: Στρατονίκη; died about 135 BC) was a princess of Cappadocia and through marriage a queen of Pergamon.

Stratonice was of Greek Macedonian and Persian ancestry. She was the first child born to King Ariarathes IV of Cappadocia and Queen Antiochis. Her younger brothers were Ariarathes V and Orophernes. Her paternal grandparents were King Ariarathes III and Queen Stratonice of Cappadocia, while her maternal grandparents were the Seleucid monarchs Antiochus III the Great and Laodice III. She was born and raised in Cappadocia.

In 188 BC, Cappadocia was accepted as a Roman ally. Later that year, Stratonice married the Greek King Eumenes II of Pergamon, based on an arrangement between her father and Eumenes II. The Kingdom of Pergamon, like Cappadocia, were allies to Rome. Eumenes II and Stratonice were distantly related, as they were direct descendants of Seleucus I Nicator.

Eumenes II visited Rome in 172 BC. During his visit, Eumenes II was hostile to King Perseus of Macedon. He informed the Roman Senate about Perseus' presumed plans to gain influence in Greece. On his return to Pergamon, Eumenes II was attacked near Cirrha and was believed to have died. Eumenes's brother Attalus II Philadelphus became king and married Stratonice. When Eumenes II returned, his brother ceded power and Stratonice returned to Eumenes II.

...
Wikipedia