How many johns in the Bible?
There is three Johns in the Bible. John the baptist, John the disciple, and John Mark.
Col 4:10 (HCSB)
Col 4 (v.10) Aristarchus, my fellow prisoner, greets you, as does Mark, Barnabas's cousin (concerning whom you have received instructions: if he comes to you, welcome him),
Col 4:10 (KJV)
Col 4 (v.10) Aristarchus my fellowprisoner saluteth you, and Marcus, sister's son to Barnabas, (touching whom ye received commandments: if he come unto you, receive him;)
The commentator John Gill said on Colossians 4:10 that:
"and Marcus, sister's son to Barnabas"; the same with John Mark, whose mother's name was Mary, said here to be sister to Barnabas, Ac 12:12 concerning whom there was a difference between Paul and Barnabas, Ac 15:37, and is the same Mark that wrote the Gospel, and was converted by the Apostle Peter, 1Pe 5:13 and who is said to have received his Gospel from him; he is also mentioned 2Ti 4:11