I have a table with x and y coordinates. It is mentioned that coordinates in "RD Bessel" system. I couldn't find it in ArcGIS and QGIS. Also no info on google?
My best guess is that you're looking for the "RD New" projection, or possibly "RD Old". In ArcGIS, it is found under: Projected Coordinate Systems -> National Grids -> Europe -> RD New. Both "RD New" and "RD Old" use the Bessel Spheroid.