Burchard von Zollern[?] was born before 1025 and died in 1061.
Burchard's son was Friedrich von Zollern[?], born before 1055, died 1114/15 .
... extrapyramidal disorder[?] Alopecia immunodeficiency[?] Alopecia macular degeneration growth retardation[?] Alopecia mental retardation hypogonadism[?] ...