Josef Jadassohn (1863 - 1936) was a German dermatologist. Jadassohn-Lewandowsky syndrome (pachyonychia congenita) (1906); Borst-Jadassohn; Jadassohn-Tièche blue naevus; Jadassohn-Bloch Technique
Felix Lewandowsky (1879-1921) was a German dermatologist. Jadassohn–Lewandowsky syndrome, Lewandowsky’s syndrome, Lewandowsky–Lutz dysplasia and Lewandowsky tuberculid