Thayer's Greek Lexicon

 John = "Jehovah is a gracious giver"
1. John the Baptist was the son of Zacharias and Elisabeth, the
forerunner of Christ. By order of Herod Antipas he was cast into
prison and afterwards beheaded.
2. John the apostle, the writer of the Fourth Gospel, son of Zebedee
and Salome, brother of James the elder. He is that disciple who
(without mention by name) is spoken of in the Fourth Gospel as
especially dear to Jesus and according to the traditional opinion
is the author of the book of Revelation.
3. John surnamed Mark, the companion of Barnabas and Paul. Acts 12:12
4. John a certain man, a member of the Sanhedrin Acts 5:6