Sister Mary Hilary Simpson OP, a Dominican Sister of Peace, died Monday, Feb. 15, at North Oaks Medical Center in Hammond.

Born in New Orleans on Jan. 17, 1938, she was the daughter of Siguard Edgar Simpson Jr. and Beatrice Vitrano Simpson.

Sister Hilary was preceded in death by her parents and her brother, Siguard E. Simpson III.

In 1955, Sister Hilary entered the Congregation of the Dominican Sisters of St. Mary, now known as the Dominican Sisters of Peace. She earned her bachelor’s degree in music education from Loyola University in New Orleans and her masters from LSU.

Sister Hillary served in the Diocese of Baton Rouge as well as the Archdiocese of New Orleans. For several years, Sister Hilary, well-known for her ability to play the trumpet, directed the music education program in the Diocese of Baton Rouge and the Archdiocese of New Orleans.

A Mass of Christian burial was celebrated by Archbishop Gregory M. Aymond at Rosaryville Spirit Life Center in Ponchatoula on Feb. 21. Interment followed in Rosaryville Cemetery.

In lieu of flowers, donations may be made to the Dominican Sisters of Peace, 2320 Airport Drive, Columbus, OH 43219 or online at