A monk. He was a Sākyan and loved holding discussions with the heretics. When he suffered defeat at their hands, he would resort to falsehood and evasion, or would ask his opponent to and meet him somewhere and then go there before the appointed time and give it out that his opponent had avoided him. This matter was reported to the Buddha, who rebuked Hatthaka for his conduct. Vin.iv.1f.; cf. DhA.iii.390.