Children of Prince Wilhelm and Gerta zu Isenburg-Büdingen.
Was it their maternal blood that made them act out? Their maternal grandmother was one of the scandalous Hanau and Horowitz morganauts and their maternal grandfather the guy who attacked his father-in-law's prime minister, the hated Hassenpflug, with a cane, when a Hessian newspaper failed to style his wife Her Serene Highness.