What part the Andrew take in the Feeding of the 5000?

He told Jesus about the boy with the 5 loaves and 2 fishes.

Source: John 6:8-9

The name Judas was a common one in Jesus time and two of his apostles were named Judas. What other name was commonly used for the other Judas?

Thaddaeus or Lebbaeus in Matthew and Mark he is referred to Judas the brother of James or Judas not Iscariot.

Source: Matthew 10:3, Mark 3:18, Luke 6:16, John 14:22

Jesus said to Matthew “Follow me.” and Mathew Followed. What was he doing when Jesus called him?

Matthew was collecting Taxes or Customs. After all that was his job.

Source: Matthew 9:9

This Apostle’s nickname meant stone or rock. What is that nickname and his given name?

His name is Simon Peter the nickname was given to him by Jesus.

Source: Matthew 16:18, Mark 3:16, Luke 6:14 and many others