This chapter discusses eponymous syndromes, including Alport’s syndrome, Asperger’s syndrome, Bardet-Biedl syndrome, Batten disease, Backer’s muscular dystrophy, Beckwith-Wiedemann syndrome, Bourneville’s disease, Briquet’s syndrome, Bruton agammaglobulinaemia, Buchanan’s syndrome, Capgras syndrome, Castleman’s disease, Chediak-Higashi syndrome, Condari-Hünermann syndrome, Cornelia de Lange syndrome, Corrigan’s syndrome, Cotard’s syndrome, Crigler-Najjar syndrome, Dandy-Walker syndrome, De Clerambault’s syndrome, Diamond-Blackfan anaemia, DiGeorge’s syndrome, Di Guglielmo’s disease, Duchenne muscular dystrophy, Ebstein’s anomaly, Edwards syndrome, Ehlers-Danlos syndrome, Eisenmenger syndrome, Erb’s palsy, Fallot’s tetrad, Fanconi anaemia, Galeazzi fracture, Ganser symptom, Gaucher disease, Hand-Schüller-Christian syndrome, Hartnup’s disease, Hunter syndrome, Huntington’s disease, Hunt’s syndrome, Hurler syndrome, Hutchinson’s triad, Ivemark syndrome, Kartagener syndrome, Kawasaki disease, Klinefelter syndrome, Kugelberg-Welander, Klippel-Feil syndrome, Landouzy-Dejerine muscular dystrophy, Laurence-Moon syndrome, Leber’s herediary optic atrophy, Lesch-Nyhan syndrome, Lewy body dementia, Li-Fraumeni synfrome, Martin-Bell (fragile x) syndrome, McCune-Albright syndrome, Monteggia fracture, Morquio’s syndrome, Niemann-Pick disease, Noonan syndrome, Ondine’s curse, Othello syndrome, Patau’s syndrome, Pick’s dementia, Pierre Robin syndrome, Pompe disease, Prader-Willi syndrome (PWS), Ramsay Hunt syndrome, Rett stndrome, Reye’s syndrome, Russell Silver syndrome, Shakhonovich’s syndrome, Still’s disease, Sydenham’s chorea, Syme’s amputation, Tay-Sachs disease, Tolosa-Hunt syndrome, Treacher Collins syndrome, Turner’s syndrome, Ulysses syndrome, Van Gierke’s syndrome, Werner syndrome, and Wiskott-Aldrick syndrome.