Answer:
The famous fictional Spaniard known as "The Man of la Mancha" is Don Quixote.
Step-by-step explanation:
Don Quixote of la Mancha is a novel written by the Spaniard Miguel de Cervantes Saavedra. Published its first part with the title of "The ingenious gentleman Don Quixote of la Mancha" at the beginning of 1605, it is the most outstanding work of Spanish literature and one the main ones of universal literature, besides being the most read after the Bible.