It is not uncommon that the apostles are simply referred to
as Peter and "his companions" or "the apostles."
Acts 2:37
... they asked Peter and the other apostles, "What are
we to do, my brothers?"
Luke 9:32
Peter and his companions had been overcome by
sleep ...
Acts 5:29
But Peter and the apostles said in reply, "We must
obey God rather than men."