Premonstratensian
noun
Pre·mon·stra·ten·sian ˌprē-ˌmän(t)-strə-ˈten(t)-shən 
: a member of an order of canons regular founded by St. Norbert at Prémontré near Laon, France, in 1120
Word History
Etymology
Medieval Latin praemonstratensis, from praemonstratensis of Prémontré, from Praemonstratus Prémontré
First Known Use
15th century, in the meaning defined above