The apostles part five and wrap up.

11)* Lebbaeus, whose surname was Thaddaeus: Matthew 10:3

No other book mentions any Lebbaeus

*Thaddaeus: Mark 3:18

Only Matthew and Mark mention Thaddaeus

*Judas son of James (NIV): Luke 6:15, Acts 1:13
*Judas (or Jude) the Brother of James (KJV): Luke 6:16, Acts 1:13, Jude 1:1

Was it son or brother?!! Which James?!! Is this the same person as Thaddaeus? Christians assume it is, because otherwise there is something wrong with the different apostle lists. Jesus had brothers named Judas and James. (Matthew 13:55) Was this another brother of Jesus? This Judas of James is not mentioned by Mark or Matthew. John 14:22 speaks once of a Judas "not Iscariot." Paul doesn't mention this person. Jude and Judas are actually the same name. So, since the book of Jude begins with a greeting from Jude, the brother of James, it is assumed the book was written by the apostle aforementioned.

More about Thaddaeus

12)* Judas Iscariot, who betrayed Jesus: Matthew 10:4, Mark 3:19, Matthew 26:25, Matthew 27:3, Luke 6:16, Luke 22:48, John 12:4, John 13:2, John 18:2,3, 5, Acts 1:16,25
*Judas Iscariot, one of the twelve: Matthew 26:14,16,47, Mark 14:10, 43, Luke 22:47, John 6:71,
*Judas Iscariot, son of Simon: John 6:71, John 12:4, John 13:2, 26, 29,

John is the only book that speaks of Judas as the son of Simon. The question is Simon who? Paul does not mention Judas. Kind of strange, don't you think?

More about Judas Iscariot

13)*Matthias, Judas's replacement: Acts 1:23,26

Matthias is not mentioned anywhere else. More about Matthias.

*How many of each of the twelve are specifically named in New Testament books, generously interpreted:
Matthew-12, Mark-12, Luke-12, John-7(Peter, Andrew, Philip, Nathaniel, Thomas,  Judas-not-Iscariot, Judas Iscariot) Acts-13, Galatians-2 (Cephas/Peter and John), 1st Corinthians-1 (Cephas/assumed to be Peter), 1st Peter-1 (Peter), Jude-1 (Jude/assumed to be Judas/ Thaddaeus), Revelation-1(John)

*Number of times the phrase "twelve apostles" or "Twelve disciples" or "the twelve" is specifically mentioned:
Matthew-8, Mark-10, Luke-8, John-4, Acts-1, 1 Corinthians-1, Revelation-1

I find it fascinating that the only two of the twelve that Paul mentioned by name are Peter and John. The James he mentions is considered to be Jesus's brother. Adding: I have caught a couple of mistakes and fixed them, mostly with chapter and verse numbers. So, I expect that I may not be precise with all my figuring, but I tried to be as accurate as possible.