Irvin Fred Litzo was born on July 18, 1918 to Friedrich and Elizabeth Eisenbraun Litzo. He was the youngest of seven children born to this couple. Irvin enlisted in the US Army on January 28, 1942 and served in Europe through WW II earning several commendations. He was released from service on Novermber 1, 1945 and returned to working on the farm in South Dakota with his two brothers. On February 28, 1951 Irvin married Martha Carolyn Petersen. Irvin adopted Martha's daughter Patricia Kaye soon after their marriage. They were soon blessed with the arrival of another daughter Peggy, in December of 1951, followed by a third daughter, Karen, in February 1953, a son Michael, in July 1954 and their youngest daughter Marianne in March of 1957. They lived for several years in the Valentine, Nebraska area, for a while in Bonesteel, South Dakota then in 1960 moved to Newport, Washington where they remained for ten years before once again moving to Aurora, Colorado to be near their eldest daughter Patti. Irvin and Martha continued to live in Aurora until his death. Irvin died of a massive coronary suffered at his daughter Peggy's residence in Aurora, Colorado. Irvin is survived by his wife of 33 years Martha C Petersen Litzo, all five of his children Patti Litzo Konst (Terrence), Peggy Litzo, Karen Litzo Talbott, Michael Litzo (Charlotte) and Marianne Litzo, Grandchildren Jerry Konst, Stephen and Stacie Talbott, Jared Litzo, and Justin and David Litzo. Also surviving Irvin are his two brothers Arthur and Henry (Art and Hank) and two sisters Amelia Kelsey (Morgan) and Helen Ludwig (J.T.), two nieces and five nephews. He was preceded in death by his parents Freidrich and Elizabeth, a brother Walter who died as an infant,a sister Martha Litzo Yenglin and one Grandson Scott Lee Konst.

Irvin Fred Litzo is the grandfather of Scott Lee Konst.