South German and Jewish (Ashkenazic): habitational name for someone from places called Holling or Hollingen.
I have recently been in communication with Alois Ohrhallinger in Austria. He has done considerable research on the name, and he believes that everyone with the Hallinger / Hollinger / Hullinger name originated in Austria. He could well be right since there are signficant concentrations of Hollinger's in Austria, and our Hullinger name came from Hollinger. His writings in the blog below.