Charles Ellicott Commentary Acts 25:26

"Of whom I have no certain thing to write unto my lord. Wherefore I have brought him forth before you, and specially before thee, king Agrippa, that, after examination had, I may have somewhat to write." — Acts 25:26 (ASV)

To write to my lord.—The Greek corresponds to the title of “Dominus,” which, though declined by Augustus and Tiberius (Sueton. Octav. c. 53; Tiber. c. 27), had been assumed by Caligula and Nero. The first of the emperors had rejected it as an “accursed and ill-omened title,” and had not allowed it to be used even by his children or grandchildren, either seriously or in play. The name “Augustus,” with its religious associations, was enough for him.