American brothers Lorenzo Niles Fowler (1811–1896) and Orson Squire Fowler (1809–1887) were leading phrenologists of their time.
Orson, with associates Samuel Robert Wells and Nelson Sizer, ran the phrenological publishing house Fowlers & Wells in New York City.
Lorenzo in England initiated the famous phrenological publishing house L. N. Fowler & Co. and gained considerable fame with his phrenology head (a china head showing the phrenological faculties), which has become a symbol of the discipline.