The bodies of the four passengers were identified Tuesday on the interior ministry's website in a posting by the prefect's office from the Tuscan town of Grosseto.
They were named as Barbara and Gerald Heil of Minnesota - the sole American victims of the disaster - and Christina Mathi Ganz and Norbert Josef Ganz of Germany.
The body of an Italian crewman was also identified Tuesday after weeks of DNA testing and other exams.
Divers continue searching the wreck for a female Italian passenger and an Indian crewman missing since the Jan. 13 accident and presumed dead. The two have already been included in the death toll of 32.