Billie G. (Wirth) Gregson, 81, of Waterloo, passed away Nov. 28, 2020, in O’Fallon. The visitation will be from 10 a.m. until time of service on Monday, Dec. 7 at SS Peter and Paul Church in Waterloo. The funeral Mass will be held at 11 a.m. on Monday, Dec. 7 at SS Peter and Paul Church with Father Linus Umoren C.M. officiating. Burial will be at the church cemetery. Quernheim Funeral Home in Waterloo is in charge of arrangements.