The Spanish legislation offers differents ways to obtain Spanish nationality. These are by residence, by option, by lettr of naturalization or with the value of simple presumption.
two possibilities for obtaining Portuguese nationality: attribution of nationality, the one that is acquired a birth according to "ius sanguinis" and the voluntary acquisition of nationality, adoption or naturalisation
The possibility of acquiring the Italian Citizenship to the descendants of Italians, whether or not they were born in the country