Jesus' Disciples. For reference.

Simon Peter (“You are Peter, and on this rock I will build my church” [Matthew 16:18], wrote 1 & 2 Peter)
 
Andrew (Peter’s brother--followed John the Baptist, first disciple called by Jesus, ran and got Peter, then seemed to step out of the way)
 
James (first to be martyred [Acts 12:2]--he and brother John were called sons of Thunder)
 
John (James’ brother, sons of Zebedee--John wrote 5 books of the Bible, including the gospel of John; he was the youngest disciple, the one Jesus loved)
 
Philip (recruited Nathanael aka Bartholomew)
 
Bartholomew (also known as Nathanael, recruited by Philip -- Jesus said, “Here is a true Israelite in whom is nothing false,” [John 1:47])

Thomas (who doubted)
 
Matthew (also called Levi, the tax collector, wrote the gospel of Matthew)
 
James (son of Alpheus -- possibly Matthew’s brother as Matthew’s father was also Alpheus [Mark 2:14])
 
Thaddaeus (also known as Judas son of James, or Lebbaeus [Matthew 10:3], may be Jude the author of Jude, but the book of Jude is more commonly attributed to Jesus’ brother, and the book of James to their other brother)
 
Simon the Zealot (very little known about him)
 
Judas Iscariot (who betrayed Jesus with a kiss)

Information about the disciples can be found at these references :

Matthew 4:18-22 (lists 12)
Matthew 9:9 (Matthew)
Matthew 10:1-4 (list)
Mark 1:16-20 (Peter, Andrew, James and John)
Mark 2:13-14 (Matthew)
Mark 3:13-18 (list)
Luke 5:27-29 (Matthew)
Luke 6:12-16 (list)
John 1:35-51 (Andrew, Peter, Philip, Bartholomew/Nathanael)
John 11:16 (Thomas)
John 14:5-6 (Thomas)
John 14:8 (Philip)
John 14:21-24 (Thaddeus/Judas/Jude)
John 20:24-28 (Thomas)
John 21:1-3 (Peter, Thomas, Bartholomew/Nathanael, James, John and “two others”)
Acts 1:13-14 (list minus Judas Iscariot)

There are many more references, especially to Peter and also to James and (of course) John, but these give glimpses of some of the lesser known disciples.