Who are Matthew, Mark, Luke, and John?

Matthew:  apostle, tax collector, wrote to the Jews

Mark:  younger than other apostles, his mother was a prominent follower,  likely a teenager when Jesus was in Jerusalem, traveled with the Apostle Paul, later traveled and stayed with Peter when Peter was imprisoned in Rome, known as Peter’s Greek interpreter (Peter, as a fisherman, many not have known Greek fluently); Mark reflects Peter’s interests in spreading the Gospel among the Gentiles

Luke:  didn’t know Jesus personally, but was taught by Paul; left his job of physician and traveled with Paul; though not himself an eyewitness, he spoke to many eyewitnesses (says so at the start of his Gospel)

John: one of the Apostles; probably read the other Gospels before he wrote his own Gospel; wrote to members of the Church who already knew about Jesus;

 

https://www.lds.org/new-era/2007/01/who-are-matthew-mark-luke-and-john?lang=eng