Симонид
Agrippa’s Greek cognomen "Simonides" doesn’t appear on his corpse or among any Jewish inscriptions in Rome. It is unknown why Josephus gave his son a Greek cognomen, he perhaps named his son after Simonides of Ceos, a Greek Poet that flourished in the 6th century BC and 5th century BC. Josephus during his years in Rome dedicated his time in studying Greek Poetry and his literacy contemporaries such as Plutarch and Quintilian remembered the works of Simonides. His second cognomen is a Latin name "Agrippa". He was perhaps named after the Herodian Prince and King Agrippa II. Agrippa II was a contemporary King to Josephus and they were very good acquaintances.