Explanation:
The monster was created by the scientist Victor Frankenstein, who wanted to create a human being using parts from other dead people. The monster was made with pieces from several different corpses, including the brain of an executed murderer.
In the book, the monster does not have a name. He is simply referred to as “the creature” or “the monster.” This is likely because he has no personality or feelings of his own, so calling him by his name would not make sense.