Simon Peter was the first among Jesus' disciples. He was a fisherman who gave up his trade to follow Jesus. He was crucified in Rome and allegedly asked to be crucified upside down, as he did not feel worthy to be crucified in the same manner as Jesus had been. Andrew was Peter's brother. At first, he was a disciple of John the Baptist, but left him to follow Jesus. He was also a fisherman.
James the Greater was the son of Zebedee and the brother of the apostle John. James was the first of the disciples to be martyred. Historians believe this happened in 44 A.D.
John was the brother of James. When Jesus was on the cross, he charged John to take care of his mother, Mary. John and Peter ran to the tomb of Jesus after Mary Magdalene had told them she'd found it empty, but John let Peter enter first.
Philip may have proselytized in Asia Minor and was martyred at Hierapolis. Nathanael, also known as Bartholomew, was introduced to Jesus through Phillip. Matthew, or Levi, was a tax collector. He too gave up his profession to follow Jesus.
According to the Bible, Thomas doubted that Jesus had indeed risen from the dead, and only believed when he touched Jesus' wounds. Thaddeus, or Jude, is thought to have had a gentle nature.
Judas Iscariot is the apostle who betrayed Jesus for 30 pieces of silver, and then hanged himself in remorse.