Atos 25
Oecumenius
Atos 25:11
"I appeal to Caesar," said Paul, wishing to escape the hands of the Jews, that is, in Rome I desire to go to the emperor and there to be tried. "I appeal to you," he says. For the name "Caesar," in Roman usage, signifies "king," just as by a common name all kings of the Romans are called Caesar, though indeed these are not their private names. For at the time of Christ's birth the ruling Caesar was called Emperor; he suffered under Tiberius Caesar. And the blessed Paul is executed in Rome under Nero Caesar. — Commentary on Acts
Atos 25:13
"Agrippa the king." That is, Agrippa was exercising the rank of king in the provinces, and therefore was addressed as king; or perhaps he himself was king of the eastern parts, Nero being ruler of the western, and while Nero was in Rome. [AMMONIUS] — Commentary on Acts
Atos 25:25-26
"appealed to the Emperor." He calls the king "Emperor" in a habitual way, as he does Caesar; and addressing him as master he says, "Concerning whom I have nothing certain to write to the master." — Commentary on Acts