John Langdon Down British physician and first person to describe Down syndrome (1828-1896) (1828–1896) Parents Hannah Haydon Joseph Almond Down Children Percival Langdon Langdon-Down Everleigh Langdon Langdon-Down Lilian Langdon Langdon-Down Reginald Langdon Langdon-Down Elspie Langdon-Down Reginald Langdon Langdon-Down Siblings Jane Down Partners Mary Crellin
