Preceded in death by parents, Charles Joseph Koukol and Agnes (Hornicek) Koukol; sister, Rosalie Koukol Taylor.

Survived by wife, Ludmila (Lida) Koukol (Matys); children, David (Cydney), Steven (Beth), and Janice (Kirk) Hanson; grandchildren, Katie, Jeffrey, Connor, Libby, Claire, Alec, Cal, Leigh, and Megan; nephews, Rev. Samuel (Diana) Taylor, Don (Ginny) Taylor, and Charles (Debbie) Taylor.

Graduate of Omaha University (now University of Nebraska at Omaha) and University of Nebraska College of Law. WWII Veteran, United States Navy; Member Beehive Lodge #1084; Tangier Shrine; and Scottish Rite. Past President, South Omaha Optimists Club;\ Advisory Board of Directors, South Omaha School Alumni Association; Elder and Board of Trustees at Presbyterian Church of the Cross.

Practiced law primarily in South Omaha and Omaha for over 50 years. After serving his Country during World War II with the U.S. Navy as a Radarman 3rd Class in the Atlantic and Pacific, he graduated from Omaha University in three years and then received his law degree from the University of Nebraska College of Law. He started his law practice in 1952 by hanging his own shingle in an office above Neneman's bakery near 24th and N Streets in what was still known as "South Omaha" (after a 1915 annexation it had its own court, jail, high school and library). One source of clients was his father, the Reverend Charles Koukol, who presided over the Bethlehem Czech Presbyterian Church at 21st and Q Streets and was known to refer his parishioners who needed a lawyer to his son. Dan later joined Hugh H McCulloch and Lewis R Leigh, which became the law firm of McCulloch, Leigh and Koukol. He practiced with this firm in South Omaha from the 1950's until the early 1980's and established a strong probate and real estate practice (some of his colleagues have said that his firm wrote most of the Wills in South Omaha up to that time). In the early 1980's Dan and Lew Leigh merged with a nascent firm that needed to establish a probate department, and until his retirement in 2004 he was a partner in that firm, which became known as Erikson & Sederstrom, P.C. Dan was a member in good standing with the Nebraska State Bar Association for over 50 years and an avid supporter of the University of Nebraska College of Law (and the Cornhuskers), South High School (Alumni Hall of Fame inductee 1988), and South Omaha (where he had his roots).

Memorials to Presbyterian Church of the Cross or Heartland Hope Mission.