From restojo, from Vulgar Latin*restuclu < *restucŭlum (compare Portugueserestolho, Aragoneserestollo, Catalanrostoll, restoll, Occitanrestolh, cf. also southern Italian dialectal restuccio), variant of *restupŭlum (compare Catalan and Occitan restoble), from a verb *restupulāre, from stupula, alteration of Latinstipula.[1]