The writer introduces Demetrius to the story and gives background information about him. Ephesus had a large temple dedicated to the goddess Artemis, sometimes translated as "Diana." She was a false goddess of fertility. (See: [[rc://en/ta/man/jit/writing-background]] and [[rc://en/ta/man/jit/translate-names]])
This is the name of a man. Demetrius was a silversmith in Ephesus who was against Paul and the local church. (See: [[rc://en/ta/man/jit/translate-names]])