Bonsouar Edmond,
Jei parle le france conmsi comsa.
If you don't mind, I'll change to english now I have no idea about Orsini here in Venezuela, though many French people migrated to South America before 1870. My great great grandfather s (on my Dad's side of the tree), came from the Pyrenees, the French Alps, from a little town called Bonnafont. Hautes-Pyrenees, Languedoc-Roussillon-Midi Pyrenees, France. Their surnames are Bernissant, Soules, Fauquet, Darrieux. My grandmom on my dad's side was born in Venezuela, but her Mom was all-French, top to toe. Her name was Jeanne Philomene Elizabeth BERNISSANT DARRIEUX, b. 1847, migrated to San Cristóbal, Venezuela My Grandmom's nane was Maria Luisa Soules Bernissant, b. 1883, in San Cristóbal, Venezuela.
Do you have the complete name of this ORSINI (de Farinole, Corsica) you're looking for?!!
Regards,
Pedro