Mother Yolanda of Vianden, O.P., was the youngest daughter of Count Henry I of Vianden and Margaret, Marchioness of Namur. She joined the Dominican monastery in Marienthal, Luxembourg, against the wishes of her parents when she was very young. She... Wikipedia
Born: 1231, Vianden Castle, Vianden, Luxembourg
Died: December 17, 1283 (age 52 years), Marienthal, Helperknapp, Luxembourg
Parents: Henry I, Count of Vianden and Margaret, Marchioness of Namur