The Mahá Niddesa (pp. 89, 92), in its explanation of vattasuddhiká, mentions, among others, Punnabhaddavattika, Vásudevavattika, Baladevavattika and Manibhaddavattika. Punnabhadda is, therefore, probably the name of a Yakkha like Vásudeva and Baladeva.
The N.P.D., s.v. Punna, suggests Punnabhadda, was the father of the Yakkha Harikesa. The Mahábhárata (i.35, 1557) gives Púrnabhadra as the name of a serpent.