Acts 23:26

τῷ κρατίστῳ ἡγεμόνι Φήλικι χαίρειν, to the most excellent governor Felix sendeth greeting. The infinitive χαίρειν is governed by λέγει or some similar verb understood. See above, Acts 15:23.

The title κράτιστος ‘most excellent’ is that which is given by St Luke at the beginning of his Gospel to the Theophilus for whom he wrote it. Hence it is probable that Theophilus held some official position, it may be under the Romans in Macedonia, where St Luke remained for some time and where he may probably have written his gospel.