Jesus I KNOW, and Paul I KNOW; but who are you?

[tonychanyt]

New King James Version, Acts 19:

15 And the evil spirit answered and said, “Jesus I know,​

γινώσκω (ginōskō)
Verb - Present Indicative Active - 1st Person Singular
Strong's 1097: A prolonged form of a primary verb; to 'know' in a great variety of applications and with many implications.

and Paul I know; but who are you?”​

ἐπίσταμαι (epistamai)
Verb - Present Indicative Middle or Passive - 1st Person Singular
Strong's 1987: To know, know of, understand. Apparently a middle voice of ephistemi; to put the mind upon, i.e. Comprehend, or be acquainted with.

Ellicott's Commentary for English Readers:

Better, Jesus I acknowledge. The two verbs are different in the Greek, the one implying recognition of authority, the latter, as colloquially used, though originally it had a stronger meaning, a more familiar acquaintance.​

Cambridge Bible for Schools and Colleges:

The verbs are not the same, though it is hardly possible in a translation to mark the difference. In the first there seems to be intended a recognition and admission of power, in the other a recognition of an appointed ministry thereof. The spirit speaking through the man would intimate: I recognise that Jesus has power over evil spirits, and I know that Paul is a true servant of Jesus, through whom Jesus manifests His power.​

New International Version:

One day the evil spirit answered them, “Jesus I know, and Paul I know about, but who are you?”​

 

[oikonomia]

Some other English renderings of Acts 19:15 are interesting.

ESV - “Jesus I know, and Paul I recognize, but who are you?”

BSB - “Jesus I know, and I know about Paul, but who are you?”

NAS - “I recognize Jesus, and I know of Paul, but who are you?”

Amplified - “I know and recognize and acknowledge Jesus, and I know about Paul, but as for you, who are you?”

CSV - "I know Jesus! And I have heard about Paul. But who are you?"

ISV - "Jesus I know, and I am getting acquainted with Paul, but who are you?"