Not really. A Kingdom of 'North' Italy only an lay down claims to Venetia geographically speaking. The Two Sicilian government under Filangieri was flexible, and considering the man's diplomatic prowess otl, managing to persuade Napoleon III to mobilize against Sardinia during the 1000 expedition (though by then it was a bit late), it wasn't out of the question that he would support a savoyard northern italian kingdom. In fact, it was Filangieri's goal. In his memoirs he points that if the two sicilies survived an invasion and managed to support a northern savoyard kingdom despite the enmity then the diplomatic safety of the Two Sicilies was basically guaranteed. The French won't really act, considering they were the ones to create the concept of a northern italian kingdom in 1853. The British supported the notion and the Austrians were ambivalent to the idea, and more interested in keeping venice out with a hearts and mind strategy(that failed otl). While the name had no historical basis, it was the most likely name to take place in 1860, before Garibaldi decided to take the Two Sicilies by the storm. Cavour's entire cabinet, which Natoli was a part of, was in support of the name as well.