The distribution map for Tubino at www.gens.labo.net
indicates a strong presence in Genoa and the surrounding area; an apparent complete absence of Tubinos in Sicily.
A couple of thoughts on meaning: Tubino, "little tube" or "pipe"; in Kashmir there is a surname Naroo, said to mean "pipe", and, according to R.M.Koul, indicating a very thin person.
An English surname, Twyer, is from the Fench Tuyere, meaning "pipe" or "tube"; according to Paul Reaney this name identified a worker at a blast furnace.
Chiappori - there is a place called Chiappari a little to the north of Genoa. The above-mentioned site has maps showing that Chiappori and Chiappari are surnames that are well represented in Liguria. Could they be two versions of the same name? One definition of Chiappa given by Jean Toti (www.jtosti.com/noms
) is a stony place, which could be a basis of place names. He also gives the name Chiappo as another form of Giacomo.
Rigacci - A surname from the forename Arrigo with the pejorative ending? Arrigaccio -> Rigaccio -> surname Rigacci?