50 ( +1 | -1 ) I have no idea what you want to call this. I have never seen it referred to as the Andersson Variation. Honestly, the specific names of openings don't really matter all that much unless you're writing a doctoral thesis on the history of chess. Just write down something--if you want a more formal designation, use the ECO codes.
After 5. Nc3 Bb4, I think the main move is 6. Ndb5 (6... Nc6 then transposes to Sicilian Four Knights). 6. Bg5 isn't bad, as long as after 6... Qa5 (better is 6... 0-0) White plays 7. Bd2.