I think I may have some information for you. Adolf (Otto) Jantz was thr brother of my maternal grandfather, Wallace Milton Jantz.I never met Uncle Otto, but have heard stories, and own several pieces of his artwork. Does any of this sound familiar to you, or am I describing a different Jantz family?
Please respond, I would love to talk more!
Catherine Iacono Also, my mother is Jeanne Catherine Jantz, daughter of Wallace Jantz, and niece of Adolf (Otto) Jantz