Ruby, known affectionately as Momma, Grandma, and MeeMaw to her kids and grandkids, was born on March 10, 1945, in Sulphur, Louisiana, to Dewey and Zora (Guidry) Oliva.  

Ruby enjoyed spending time with family, watching old Western movies and shows, making silly jokes, smiling and laughing.

She is survived by her husband, Joe Cavin of Whitesboro; sons, Hershell Cavin and wife Cynthia of Katy, Texas, and Bobby Lynn Posey of West Texas; daughters, Deannie Beard of Gainesville, Texas and Karen Posey of Durant, Oklahoma; grandchildren, Arin Wells and wife, Abbie, Emma Cavin, Jackson Cavin, Adam Joshua Cavin, Daniel Abraham Cavin, Anna Baker, and Tori Hudson; five great-grandchildren; and her niece, Renee Rudolph, who was like a daughter to Ruby and Joe, and her husband, Mark, of Marrero, Louisiana , and brother, Farnest James Oliva of Sulphur, Louisiana.

Ruby was preceded in death by her parents, Dewey and Zora Oliva; brother, Edgar Lee Oliva and sisters, Florence Persohn, Theresa Oliva, Shirley Ann Breaux, and Mary Lou DuPree.

Funeral services honoring Ruby were held at 11:00 a.m. on Monday, October 26, 2026, at Turrentine Jackson Morrow Funeral Home in Whitesboro, officiated by Rev. Rick Carney. Interment followed at Collinsville Cemetery. Visitation for family and friends was held from 4:00 p.m. to 6:00 p.m. on Sunday, October 25, 2026, at the funeral home.