Quasimodo is the protagonist of the 1996 Disney film The Hunchback of Notre Dame. He is a physically deformed young man that lives within the Notre Dame cathedral, acting as its bell ringer. Despite his appearance, Quasimodo is a kindhearted and gentle person. He longs to experience the world outside the stone walls of the cathedral.
Quasimodo is appears in the Kingdom Hearts series as a supporting character.
Another character named Quasimodo appears in the Hotel Transylvania franchise. Since most characters in those movies are taken from stories in the public domain, it can be safely assumed that they are the same person.