Sylvia B. Yellow Thunder

Sylvia B. Yellow Thunder of Oglala, South Dakota, born in Ideal, South Dakota, passed away on March 13, 2026 at the age of 91. Her vibrant spirit touched the lives of many, and she will be deeply missed by all who knew her.

She was preceded in death by her parents, Louis Spotted Elk and Susie Forked Tail; her husband, Winfred Yellow Thunder, Sr.; her sons, Winfred Yellow Thunder, Jr., Jim Yellow Thunder, Sr., Ruben Yellow Thunder, Sr., Orville Yellow Thunder, and Curtis Yellow Thunder; her sister, Mildred Provencial; her nephews, Joseph Garreaux and Milo Sits Poor; her grandchildren, Carmelita Yellow Thunder, Ruben Yellow Thunder, Jr., Sherilyn Brown Eyes, Winona Kaquatosh, Cody Yellow Thunder, and Ruben Yellow Thunder III; and her pet, Tiger.

Sylvia is survived by her sons, Patrick Yellow Thunder and Thomas Yellow Thunder; her daughter-in-law, Charlette Frogg; her nephews, Dave Kelly, Kevin and Forrest Sits Poor; her grandchildren, Lynette DuBois, Eric DuBois, Gentry Ribitsch (Mykala), Natasha Ballentine (Sean), Tesse (Amos), Riva Red Feather, Alisha Yellow Thunder, Jim Yellow Thunder, Jr., Christopher Yellow Thunder, Jaymie Yellow Thunder, Joseph Yellow Thunder, and Kimberly Yellow Thunder; her great-grandchildren, Mariah DuBois, Nathaniel DuBois, Kaylynn, Genriel Ribitsch, Laniah Ribitsch, Tashina Hard Heart, Jarrian Ribitsch, Shaylene Yellow Thunder, Athena Yellow Thunder, Katrina Yellow Thunder, Joseph, Chyeann Allbee, Chavez Little, Jodessa Yellow Thunder, Leona Yellow Thunder, Bradley Yellow Thunder, Ruben Yellow Thunder, Angel Ballentine, Dionte Ballentine, Kimimila Ballentine, Tuki Lone Elk, Tasina Lone Elk, Chris Lone Elk, Jr., Chauntae Lone Elk, and McGavyne Lone Elk; and her pets, Fynn, Luna, Honey, and Harley.