This may be the marriage record for the couple you are looking for. If you look up the record you should find both couples parents names.
Record:6 Year:1884 Groom:francesco orlando
Bride:maria teresa scannone
found on the "# ITALY: Basilicata: Marriages 1866-1910, Moliterno, Province of Potenza, Basilicata, Italy - International Records" on rootsweb thru a link on http://en.wikipedia.org/wiki/Moliterno