Brother Wit
The name adopted by Tristan in one of his many attempts to meet Isolde during an exile from Mark’s court.
He faked his own death, entered a monastery, and called himself “Brother Wit”. Sneaking to his own funeral in Cornwall, he made himself known only to Isolde, who then feigned illness. Representing himself as a physician, Tristan managed to enter Isolde’s chamber where they enjoyed a few hours together.
Source
Tristan als Mönch | Early to mid 13th century