Antoine Bernard-Jean Marfan (June 23, 1858 – 1942) was a French paediatrician. He was born in Castelnaudary (département Aude, Languedoc-Roussillon) to Antoine Prosper and Adélaïde Thuries. He began his medical studies in Toulouse, where he stayed for two years before moving to Paris. He graduated in 1886, his education having been interrupted by a period of military service. In 1914 he became Professor of Infantile Hygiene in the paediatric clinic of the University of Paris.
In 1896, Marfan described a hereditary disorder of connective tissue which became known as Marfan Syndrome