Luke
Acts 8:27ESV·traditional attribution

And he rose and went. And there was an Ethiopian, a eunuch, a court official of Candace, queen of the Ethiopians, who was in charge of all her treasure. He had come to Jerusalem to worship

John Calvin Reformed @genevareformer

27. Behold, a man, an Ethiopian. He calleth him a man, who he saith shortly after was an eunuch; but because kings and queens in the East were wont to appoint eunuchs over their weighty affairs, thereby it came to pass that lords of great power were called generally “Promiscue,” promiscuously. eunuchs, whereas, notwithstanding, they were men.

Matthew Henry Presbyterian @wholebiblehenry

We have here the story of the conversion of an Ethiopian eunuch to the faith of Christ, by whom, we have reason to think, the knowledge of Christ was sent into that country where he lived, and that scripture fulfilled, Ethiopia shall soon stretch out her hands (one of the first of the nations) unto God, Psa 68:31. I.

Commenting on Acts 8:26-40

John Gill Reformed Baptist @doctorgill

Was returning,.... From Jerusalem, having finished the parts of divine worship he came to perform; and it is remarkable, that though he must doubtless have heard of Jesus of Nazareth, and what had passed in Jerusalem lately, and of his apostles, yet heard them not; or however, was not converted by them, nor believed in Jesus; his conversion being ordered to be at another time...