If you made two people pad up and fight all day and didn't teach them anything but rather told them to create their own martial art, this move would evolve pretty early on.
It doesn't come from any style, it would be easier to name the styles it doesn't appear in.
Too many different names, the name will usually include the hand gesture as well as the arm so there will be a huge number of differently named manifestations of this movement.
Why so interested in this movement?
問「武」。曰:「克。」未達。曰:「勝己之私之謂克。」