Rev. Fr. Mathias Wolff, SJ (1779–1857)
Rev. Fr. Mathias Wolff, SJ, Founder of the Congregation of the Sisters of Jesus Mary Joseph (JMJ), was born on 9 March 1779 in Diekirch, Luxembourg, to Mathias Wolff and Anna Maria Zenner. Raised in a simple, hardworking, and deeply religious family, he developed a profound love for God and, from an early age, desired to become a priest. Guided by his uncle, Fr. Joseph, he grew in faith, wisdom, and a spirit of generous service.
Despite the challenges brought about by the French Revolution and the suppression of the Society of Jesus, Fr. Wolff remained steadfast in his vocation. He was ordained a priest in 1802 and entered the Society of Jesus (Jesuits) in 1815, dedicating his life to the greater glory of God and the service of His people.
As a missionary in the Netherlands, Fr. Wolff was deeply moved by the poverty and lack of educational opportunities, especially among young girls. Inspired by God's providence and guided by a bold vision, he founded the Society of Jesus Mary Joseph on 29 July 1822 in Amersfoort, with the mission of providing Christian education and forming young people in faith and virtue.

A man of deep prayer, unwavering trust in God, and compassionate service, Fr. Mathias Wolff inspired the sisters to be ever adaptable in apostolic availability, responding generously to the needs of the Church and society. His spiritual wisdom, especially reflected in the Pious Maxims, continues to guide the JMJ Sisters in their ministries of education, healthcare, pastoral ministry, and social apostolate.
Fr. Mathias Wolff passed away on 31 October 1857, at the age of 78, after a life of faithful service to God and His people. His legacy continues to inspire the JMJ Sisters as they proclaim the Gospel and serve humanity with Love, Joy, and Service.