There were together Simon Peter, and Thomas called Didymus, and Nathanael of Cana in Galilee, and the sons of Zebedee, and two other of his disciples.
There were together Simon Peter, and Thomas called Didymus, and Nathanael of (or 'from') Cana in Galilee - as to whose identity with Bartholomew the apostle, see the note at Matthew 10:3. And the sons of Zebedee. Here only, as Stier observes, does John refer to himself in this manner.
And two other of his disciples - that is, two other apostles: so there were seven in all present.