1852 - Studebaker Brothers wagon company, precursor of the automobile manufacturer, is established
1857 - The National Deaf Mute College (later renamed Gallaudet University) is established in Washington, DC becoming the first school for the advanced education of the deaf.
... April 3 - Sally Rand[?], dancer (+ 1979)
April 7 - Ralph Bunche[?], diplomat, winner of the Nobel Peace Prize
April 16 - Fifi D'Orsay, actress (+ 1983)
April 22 - ...