One of the Licchavis. His personal name (múla-náma) was Maháli, but he was called Otthaddha because he had a hare-lip (addhotthatáya) (DA.i.310).
He went to visit the Buddha at the Kútágárasálá in Vesalí, at a time when the Buddha had given orders that no one should be allowed to see him; but through the intervention of the novice Síha, Otthaddha was admitted to the Buddha's presence with a large retinue of followers, all splendidly adorned in various ways, though it is stated that earlier in the day they had taken the uposatha-vows. The conversation that took place between Otthaddha and the Buddha is recorded in the Maháli Sutta (D.i.150ff).
Buddhaghosa calls Otthaddha a rájá.