Count Panzutti

Count Panzutti ("Conte di Panzutti") is an 18th-century Italian hereditary title, famously held by Fortunato and Guillaume de Félice. 
The title was passed by decree by the Contessa di Panzutti who held it "suo jure" as instructed in the 1st Count's will to Fortunato Felice in 1756, and has continued being inherited in such a manner to the present day. The heir apparent of the Contadi is styled Vicomte (Viscount) or Vicomtesse (Viscountess) Yverdon.
Counts Panzutti.
As the title is held 'suo jure', the Heir Apparents are the present holder's children, chosen upon the present holder's death: