'Emperor' in the Bible

Jason has received them into his house; and they all set Caesar's authority at defiance, declaring that there is another Emperor-- one called Jesus."

I could not discover that he had done anything for which he deserved to die; but as he has himself appealed to the Emperor, I have decided to send him to Rome.

Submit, for the Lord's sake, to every authority set up by man, whether it be to the Emperor as supreme ruler,

Honour every one. Love the brotherhood, fear God, honour the Emperor.