John 1:40
One of the two which heard John speak, and followed him, was Andrew, Simon Peter’s brother.
Cross-reference
John 12:22 shows Andrew again bringing people (the Greeks) to Jesus — consistent with his role as a connector.
John 6:8 names Andrew as Simon Peter's brother — consistent identification with John 1:40.
Matthew 4:18 introduces Andrew and Peter as brothers fishing — same relationship noted in John 1:40.
Mark 1:16 gives a parallel account of Jesus calling Andrew and Simon from their fishing — same event from another Gospel.
Mark 13:3 shows Andrew as one of the four disciples asking Jesus privately about the end times — indicating his close discipleship.
Matthew 10:2 lists Andrew as Peter's brother in the apostolic roster — same identification.
Mark 3:18 lists Andrew among the twelve apostles — confirming his later role in Jesus’ ministry.
Luke 6:14 lists Andrew among the apostles — another Gospel’s record of the twelve.