The name Vanessa was invented by author Jonathan Swift for his poem 'Cadenus and Vanessa' (1726). He came up with the name by rearranging the initial syllables of the first name and surname of Esther Vanhomrigh, his close friend. Vanessa was later used as the name of a genus of butterfly. It is sometimes mistakenly translated as the Greek word for butterfly. That is incorrect. The Greek word for butterfly is petalutha.