Oportounos 2 was bishop of Pisa (in Tuscia); he attended all five sessions of the Lateran Council, from 5 October to 31 October 649, and in the list of bishops present is named in eighty-ninth place: Conc. Lat., p. 6, line 18 (Ὀπορτούνου ἐπισκόπου Πίσης), p. 7, line 18 ("Oportuno Pisano episcopo") (the first session), cf. pp. 35, 115, 181 and 251 (the Latin version only is repeated for the other sessions). He subscribed the definition of the faith agreed by the Council at its fifth session: Conc. Lat., p. 400, line 1 (Ὀπορτοῦνος ἐπίσκοπος Πίσης), p. 401, line 1 ("Oportunus episcopus sanctae Pisane ecclesiae").

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