Sicily
Origin
From Italian Sicilia, from Latin Sicilia, from Ancient Greek Σικελία (Sikelia), from Σίκελος (Sikelos), the name of an ancient, indigenous people on the Tiber.
Usage notes
While the rules of English state that proper nouns ending in y add an s to form their plural (as in Germanys and Marys), Sicily is an exception to this rule, as in Kingdom of the Two Sicilies.