Does John the Baptist have a last name?

Mandate of Israel:

Israel, like ancient cultures named their sons from their patriarchal or tribal origins. The prefix ben or bar means "son of", eg. Shimon barKochva: Simon son of Thunder. David barLev. Saudis, Scots, Irish also uses this form. Ibn Saud, McDougal.

John's name would have been Yokanan benZekaryah

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none, there is another john was pronounced in The Bible, his name was john the beloved, he is one of the apostles of Jesus leaning down in his chest.