On Tuesday, July 27, 2021, Duane Charles Tiefenbrun, loving husband, father, and Poppa, passed away at age 69. Duane was born on July 2, 1952, in OKC to Paul and Jeane Tiefenbrun. He married Lissa Hails on August 21st, 1976, and their only son, Nathan, was born in 1983. Duane had a passion for the outdoors, whether duck hunting, fishing, gardening, or golf. If you want to see someone with a heart of gold, look at Duane. His heart was as big as the outdoors he loved so much. He was a "go -to" man not only for his own family whom he adored, but to anyone in need. Though an OU fan, he received his degree from OSU in Stillwater in 1976 and worked 38 years on the staff of C.H. Guernsey & Company. Duane was preceded in death by his dad, Paul, and his mom, Jeane. He is survived by his loving wife, Lissa; his son, Nathan, and his family Erin, and their two daughters, Charlotte and Lillian. He is also survived by his brothers: Alan and Alma Tiefenbrun of Eufaula, OK and their children Dale, Kevin (Jenny); Phil and Cathy Tiefenbrun, and their children Mark and Brenda (Jason) of Ft. Worth; mother-in-law, Lucille Hails of Del City; brother-in-law and sister-in-law, Rocky and Darise Hails of Oklahoma City and their family Heather and Sean (Kelsey). Viewing will be Saturday, 4-7pm and Sunday, 11-8 at Mercer-Adams. Funeral services will be held on August 2, 2021, at 11:00am at Mercer-Adams Chapel, Bethany. Interment will be at Resthaven Memory Gardens. . Viewing Mercer-Adams Funeral Service Saturday, July 31, 2021 4:00 PM - 7:00 PM 3925 North Asbury Avenue Bethany, Oklahoma 73008 Viewing Mercer-Adams Funeral Service Sunday, August 01, 2021 11:00 AM - 8:00 PM 3925 North Asbury Avenue Bethany, Oklahoma 73008 Funeral Service Mercer-Adams Chapel Monday, August 02, 2021 11:00 AM 3925 N. Asbury Bethany, OK 73008