William Henry Cahill, “Billy” was born in New Orleans on December 6, 1935. He passed away surrounded by his loving wife and family early on September 2, 2019. He loved his family and loved being a father and a grandfather. He was in the Army where all 4 children were born working at NSA from August 1959 – May 1965. He returned to New Orleans in 1965 to raise his family and begin his 50 year long career at Tulane University where he worked from May 1965 until he retired. He is survived by his beloved wife, Carol Deas, and his children Billy (Ann) Cahill, Eve (Wayne) Barrett, Donna (Ray) Dackerman and Shawn (Leigh) Cahill, and Carols children, Chris Deas, Susan (Randy) Thibodeaux, Patty Deas (Lisa Smith) and his Grandchildren, Amanda Barrett, Justin & Mandy Barrett, Andrew Barrett, Maddie Cahill, Connor Cahill, Dylan Dackerman and Carols Grandchildren, Benjamin Thibodeaux and Cole Smith. He is the brother of Connie (Bob) Gay, Betty (Phil) Kennedy, Bobby (Janne) Cahill and Michael Cahill. He also is survived by many nieces and nephews and great-nieces and nephews. He is preceded in death by both parents, William Henry Cahill Sr. and Virgile Henrtizy Cahill and Carols, son, Conrad Deas. He graduated from Jesuit High School in 1954 and Loyola University in 1958. He has been a Holy Name of Jesus parishioner for 54 years. Funeral services will be held Monday Sept 9 at Holy Name of Jesus Catholic Church, 6367 St. Charles Ave. with visitation from 10:00 a.m. to 12:00 p.m. followed by mass. Interment to follow at Metairie Cemetery, 5100 Pontchartrain Blvd., New Orleans. The family requests in lieu of flowers memorial masses, donations to the Wounded Warriors (https://Support.woundedwarriorproject.org) or the Glioblastoma Foundation (https://glioblastomafoundation.org/get-involved/donate).