english: He is the only son of the late Prince Gustaf Adolf (1906-47) and Princess Sibylla of Saxe-Coburg-Gotha (1908-72).
non_english: Panjenengané iku putra tunggal saka Pangeran Gustaf Adolf (1906-1947) lan Putri Sibylla saka Saxe-Coburg-Gotha (1908-1972).