Younger brother of Devánampiyatissa.
He witnessed the miracles which attended the arrival of the Buddha's Relics in Ceylon, and, with one thousand others, entered the Order (Mhv.xvii.57f).
When Mahá Arittha recited the Vinaya at the Thupáráma and held the Sangíti at the suggestion of Mahinda, Mattábhaya, with five hundred others, was charged with the duty of learning the Vinaya from him. Sp.i.103.