O’Brien, Maureen G. of Upper Montclair, New Jersey on Thursday, March 12, 2020. Beloved wife of John. Devoted mother of Patty (Steve), John, Tim (Hitomi), Ginny (Paul), Nancy (Peter) and Pete. Cherished grandmother of Dan, Will, Seiji, Rei and Grace. A memorial mass will be offered at St. Cassian Church, 187 Bellevue Avenue, Upper Montclair on a date to be announced.