OET interlinear YHN (JHN) 1:31

uW Translation Notes:

Note 1 topic: writing-pronouns

κἀγὼ οὐκ ᾔδειν αὐτόν

(Some words not found in SR-GNT: Κἀγώ οὐκ ᾔδειν αὐτόν ἀλλʼ ἵνα φανερωθῇ τῷ Ἰσραήλ διά τοῦτο ἦλθον ἐγώ ἐν ὕδατι βαπτίζων)

Here, him refers to Jesus. If it would be helpful in your language, you could state this explicitly. Alternate translation: [And I did not know Jesus]

Note 2 topic: figures-of-speech / explicit

κἀγὼ οὐκ ᾔδειν αὐτόν

(Some words not found in SR-GNT: Κἀγώ οὐκ ᾔδειν αὐτόν ἀλλʼ ἵνα φανερωθῇ τῷ Ἰσραήλ διά τοῦτο ἦλθον ἐγώ ἐν ὕδατι βαπτίζων)

John means that he did not know previously that Jesus was the Messiah. It does not mean that he didn’t know who Jesus was, because Jesus was his cousin. You could include this information if that would be helpful to your readers. Alternate translation: [And I did not know that he was the Messiah]

Note 3 topic: figures-of-speech / doublet

ἵνα φανερωθῇ τῷ Ἰσραὴλ διὰ τοῦτο

in_order_that ˓may_be˒_revealed ¬the (Some words not found in SR-GNT: Κἀγώ οὐκ ᾔδειν αὐτόν ἀλλʼ ἵνα φανερωθῇ τῷ Ἰσραήλ διά τοῦτο ἦλθον ἐγώ ἐν ὕδατι βαπτίζων)

John uses the redundant words so that and because of this to emphasize the reason why he was baptizing people. If it would be helpful in your language, you could combine these phrases and indicate the emphasis. Alternate translation: [for the exact purpose that he might be revealed to Israel]

Note 4 topic: figures-of-speech / metonymy

τῷ Ἰσραὴλ

¬the (Some words not found in SR-GNT: Κἀγώ οὐκ ᾔδειν αὐτόν ἀλλʼ ἵνα φανερωθῇ τῷ Ἰσραήλ διά τοῦτο ἦλθον ἐγώ ἐν ὕδατι βαπτίζων)

John uses the name of the nation, Israel, to represent the people who belong to that nation. If this might confuse your readers, you could express the meaning plainly. Alternate translation: [to the Israelites]

Note 5 topic: figures-of-speech / explicit

διὰ τοῦτο

(Some words not found in SR-GNT: Κἀγώ οὐκ ᾔδειν αὐτόν ἀλλʼ ἵνα φανερωθῇ τῷ Ἰσραήλ διά τοῦτο ἦλθον ἐγώ ἐν ὕδατι βαπτίζων)

Here, this refers to the revealing of the Messiah to Israel that is mentioned in the previous clause. You could include this information if that would be helpful to your readers. Alternate translation: [because he might be revealed]