Don Quixote (novel and character)
Refers to Cervantes' novel and its protagonist. Used in literary and cultural contexts.
Don Quixote is a famous Spanish novel.
Don Quijote (discount store chain)
Japanese discount store chain known for its wide variety of products and late-night hours. Often colloquially shortened to ドンキ.
I bought a lot of snacks at Don Quijote.
He is an idealist just like Don Quixote.
Don Quijote is convenient because it's open until late at night.
From Spanish 'Don Quijote', via the novel by Cervantes. The store name is derived from the literary character.