Rena, very rare, has a Piedmontese strain, especially in Turin, with presences in Lombardy, Reni is if possible even rarer, it would be Emiliano or Toscano, Renis has a strain between Neapolitan and Salerno Salerno and a Salentino, Reno, absolutely very rare, It would be of Salento, could derive from the Gens Renia or the Latin nomen Renus, Rena of which we have an example in the writer Renus Savinus, but it is also possible a origin obtained from the apheresis of names like Tirrenus or Serenus.
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