If you haven't seen it already, I would recommend "The Chosen"! The first episode of Season 2 can be viewed by clicking here!
Smith's Bible Dictionary
Ab'ba. See Ab.
These files are public domain.
Smith, William, Dr. Entry for 'Abba'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/a/abba.html. 1901.