Luke 5:6-7, 9-10
"...they caught a great number of fish, and their net was breaking. So they signaled to their partners in the other boat to come and help them...he and all who were with him were astonished at the catch of fish which they had taken; and so also were James and John, the sons of Zebedee, who were partners with Simon..."
Andrew and Simon Peter were brothers and fishermen, along with James and John, who were also brothers and fishermen. Not only that, but the two pairs of brothers were partners in the fishing business. Cool! :)