Buddhist Dictionary of Pali Proper Names by G P Malalasekera
Opamañña
Opamañña:1.Opamañña.-One of the names of Pokkharasāti (M.ii.200).He was so called because the name of his family (gotta) was Upamañña (MA.ii.804).
2.Opamañña.-A Gandhabba chieftain,who was among those present at the preaching of theMahāsamaya Sutta (D.ii.258).He is mentioned in the Atānātiya Sutta (D.iii.204),in a list of eminent yakkha generals.