This map plots the settings and references in Harry Potter and the Chamber of Secrets

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Page 61. " Professor Severus Snape was Harry’s least favourite teacher "

The name Severus means ‘severe’ in Latin. It is also the name of the Roman Severan Emperors, one of whom – Septimius Severus – was notorious for his persecution of Christians.

According to Rowling, the surname Snape is taken from the village in Suffolk, although the word is also an English verb meaning ‘to be hard upon’ derived from the Norse verb ‘sneypa’ (to disgrace).