A wanderer (paribbājaka). He was the teacher of Brahmadatta. It was the discussion between these two, in the Ambalaṭṭhikā park, regarding the virtues of the Buddha, his Dhamma and his Order, which led to the teaching of the Brahmajāla Sutta (D.i.1). Suppiya was a follower of Sañcaya Belaṭṭhiputta. DA.i.35.