Oberon is a king of the fairies in medieval and Renaissance literature. He is best known as a character in William Shakespeare's play A Midsummer Night's Dream, in which he is King of the Fairies and spouse of Titania, Queen of the Fairies.
The Reconciliation of Titania and Oberon by Joseph Noel Paton
One of William Blake's illustrations to his The Song of Los. Scholars have traditionally identified the figures as Titania and Oberon, though not all new scholarship does. This copy, currently held by the Library of Congress, was printed and painted in 1795.
Illustration of Oberon enchanting Titania by W. Heath Robinson, 1914
A fairy is a type of mythical being or legendary creature, generally described as anthropomorphic, found in the folklore of multiple European cultures, a form of spirit, often with metaphysical, supernatural, or preternatural qualities.
Fairy
1888 illustration by Luis Ricardo Falero of common modern depiction of a fairy with butterfly wings
Title page of a 1603 reprinting of Daemonologie
Illustration of a fairy by C. E. Brock