Fritz Von Erich
Although Sieber was billed as being the brother of Jack Barton Adkisson Sr. (Fritz Von Erich), the two men were not related. However, Sieber was a distant cousin of Doris Adkisson, Adkisson Sr.'s wife. In 1985, professional wrestler William Vaughan was introduced to Fritz Von Erich's World Class Championship Wrestling promotion under the ring name Lance Von Erich, purportedly the son of Waldo Von Erich; Vaughan and Sieber were not related.