“His father’s mistress, Caltuna, bore Dracul a second son named Vlad. She eventually entered a monastery and took the name Eupraxia. Her son later became known as Vlad the Monk, because he followed in his mother’s footsteps, pursuing a religious vocation.” (from the book In Search of Dracula, page 17).
The only mention of Vlad the Monk in historical sources were always when Vlad Dracula was raiding and pillaging the Saxon Transylvanian towns because they sheltered his political rivals. One of these political rivals was Vlad the Monk, a legitimate contender for the throne of Wallachia. Not much is known about Vlad the Monk either apart from his devotion to the Orthodox church (his religious name was Pahomie) and is the half-brother of both Vlad Dracula and Radu the Handsome. My only reference of Vlad the Monk was his only blurry portrait where he appeared to wear a tall monk hat. In this illustration, Vlad the Monk wore an embroidered shirt (cămaşa) and closed embroidered sheepskin vest (înfundat).