According to the Tecnam Italy website, the Pascale brothers have been building aircraft for 50 years. The company 'Partenavia' was a joint venture with an Italian Govt parastatil. In the model identifier 'P' is for Pascale, the designer and in the case of the Partenavia '68' the year it was designed.
A Google pulled up this Oz link to the twin:
Aircraft for Sale, Plane Sales, Planes for Sale – Aviation Advertiser ? – Online Magazine Tecnam’s P2006 twin – a sneak preview
Tecnam is a privately owned company and not linked to Vulcanair which seems to be associated with Alenia.