A case of transsexualism with homosexuality of Kinsey type 6 is described, in whose maternal kinship were found a large number of persons with various types of sexual abnormalities including one case of probable transsexualism. The pattern of intermarriage produces from generation to generation an increasing number of children with such abnormalities. The patient and a number of relatives also show epilepsy. That disorder seems to exist mainly in the paternal kinship, and the coexistence of transsexualism and epilepsy in the patient seems coincidental.