Lord Jesus Christ commissioned the 12 Apostles in order to spread His teachings. Thus, the twelve apostles were the closest followers or disciples of Jesus. Basically, the word apostle refers to ‘one who is sent out’.
They travelled with Jesus Christ and learned from Him. Plus, they shared the final meal, that is, the Last Supper with Jesus the night before He was executed. They were sent out by Jesus to be His witnesses after His resurrection and ascension.
The names of the 12 apostles are listed in Matthew 10:2-4, Mark 3:14-19, and Luke 6:13-16.
“These are the names of the twelve apostles: first, Simon (who is called Peter) and his brother Andrew; James son of Zebedee, and his brother John; Philip and Bartholomew; Thomas and Matthew the tax collector; James son of Alphaeus, and Thaddaeus; Simon the Zealot and Judas Iscariot, who betrayed him.”
~ Matthew 10:2-4