1. Mongan, a 7th Century Irish King, is said to have assumed the shape of a wolf having learnt to shapeshift while visiting Tír Tairngire (a mythical place similar to Tír_na_nÓg.
He also took the form of a stag, a salmon, a seal, a swan.
2. Perhaps disappointingly, Sigmund Freud’s “Wolf Man” wasn’t suffering from clinical lycanthropy (in which a patient suffers from the delusion that they can or have transformed themselves into a wolf). His patient, a wealthy Russian nobleman, had a severe phobia of wolves and for many years had suffered nightmares in which: “Suddenly the window opened of its own accord and I was terrified to see some white wolves in the big walnut tree in front of the window.”
After four years of psychotherapy Dr Freud concluded that the tree represented his patient’s family (as in “family tree”) and that his sister had traumatized him with the story of Little Red Riding Hood as a child.
3. Demonologists Ed and Lorraine Warren helped a British man, William Ramsey, in 1983, who it’s claimed had attacked a number of people and had experienced strange phenomena from childhood. They, with support from Bishop Robert McKenna, helped him with his “werewolf demon” and the case was written up in their 1991 book Werewolf: A True Story of Demonic Possession. In "Werewolf," the Warrens reported that Ramsey was well, happy and writing a novel at his home in Southend-on-Sea.