In egypt there is a place where the pharaohs drew over 200 grappling techniques on a wall. I was there and it looks a lot like wrestling and BJJ. If I remembered the name I could have noted it down. I think typing pharonic wrestling in google might get you some results. Another thing is Turkish wrestling, which is disgusting yet very effective. Its basically mud wrestling, originally in the nude, nowadays they wear some really tight leather stuff around their torso. Turkish wrestling includes anal grabs and other sick takedowns and locks, because its one of the only places you can get a firm hold when the fighters pre-oil themselves before fighting in mud. Sadly, im pretty sure those nudists could beat any dogi wearer in most cases.