Thethmar, also referred to as Theodemar, was a German priest belonging to the Premonstratensian order. Living during the 12th century, he served as a missionary alongside his contemporary and friend, Saint Vicelinus. He is primarily recognized for his religious efforts to convert the Wends, a tribal group residing in what is now modern-day Germany.
Life and work
As a Premonstratensian canon, Thethmar dedicated his life to missionary work. Working in partnership with Saint Vicelinus, he focused his spiritual efforts on the Wendish people. His activities were centered in the regions of Germany during the mid-1150s, contributing to the expansion of the Catholic faith in that area.
Veneration
The Catholic Church commemorates Thethmar as a saint. His feast day is observed annually on May 17. He is remembered for his service as a priest and his missionary labors among the Wends.