Saint Andrew the Apostle, as his title suggests, was one of the apostles of Jesus Christ. His brother, Simon Peter – most known as St. Peter– was also a disciple. The brothers were fishing when Jesus approached them and asked them to become his disciples.
Saint Andrew was mentioned multiple times in the Gospels. There was an account that he was the one who informed Jesus Christ about boy with the loaves and fishes. He was also present at the last supper.
He was martyred through crucifixion in Patras. Based on the Acts of Andrew, he was bound to the cross instead of being nailed to it. And the cross was in an X-shape (“saltire”) as per St. Andrew’s request. It is believed that he was unworthy to be crucified the same way as Jesus’ cross.
He is the patron saint of Scotland and Russia.