What was the relationship between Philip the Deacon and Paul?

On the way to Jerusalem, Paul and his companions stayed several days at Philip’s house, in Caesarea. Acts 21:8-10

What the Bible says

Acts 21:8

And the next day departing, we came to Caesarea. And entering into the house of Philip the evangelist, who was one of the seven, we abode with him.

Acts 21:9

And he had four daughters, virgins, who did prophesy.

Douay-Rheims Bible (Challoner revision), public domain.