When Arnold Jay Koelliker was born on 12 October 1924, in Salt Lake City, Salt Lake, Utah, United States, his father, Conrad Koelliker, was 37 and his mother, Edith Camill Hawley, was 37. He married Bonnie Jean Mc Cardle on 1 January 1947. They were the parents of at least 1 son. He lived in Salt Lake City Ward 6, Salt Lake City, Salt Lake, Utah, United States in 1940. He died on 4 April 2008, in Las Vegas, Clark, Nevada, United States, at the age of 83, and was buried in Las Vegas, Clark, Nevada, United States.