A Paribbājaka. He was the teacher of Brahmadatta. It was the discussion between these two, in the Ambalatthikā park, regarding the virtues of the Buddha, his Dhamma and his Order, which led to the preaching of the Brahmajāla Sutta (D.i.1). Suppiya was a follower of Sañjaya Belatthiputta. DA.i.35.