OET interlinear 3 YHN (3 JHN) 1:7

uW Translation Notes:

Note 1 topic: figures-of-speech / metonymy

ὑπὲρ & τοῦ ὀνόματος

(Some words not found in SR-GNT: ὑπέρ Γάρ τοῦ ὀνόματος ἐξῆλθον μηδέν λαμβάνοντες ἀπό τῶν ἐθνικῶν)

John is referring specifically to the name of Jesus. He is using the term name by association to mean Jesus himself. If it would be helpful in your language, you could state the meaning plainly. Alternate translation: [to tell people about Jesus]

Note 2 topic: figures-of-speech / explicit

μηδὲν λαμβάνοντες ἀπὸ τῶν ἐθνικῶν

(Some words not found in SR-GNT: ὑπέρ Γάρ τοῦ ὀνόματος ἐξῆλθον μηδέν λαμβάνοντες ἀπό τῶν ἐθνικῶν)

John assumes that Gaius will know what he means by receiving nothing from the Gentiles. If it would be helpful to your readers, you could indicate that explicitly. This could mean: (1) that the traveling believers had resolved not to accept any help from unbelievers. Alternate translation: [and they have resolved not to accept any help from unbelievers]; (2) that people who did not believe in Jesus would not help these traveling believers. Alternate translation: [and no unbelievers are assisting them]

Note 3 topic: figures-of-speech / explicit

τῶν ἐθνικῶν

the pagans

Here, Gentiles does not mean people who are not Jewish. It refers to any people who do not trust in Jesus. Alternate translation: [unbelievers]