Paul Hugo Hensel (May 17, 1860, Groß-Barthen near Königsberg – November 11, 1930, Erlangen) was a German philosopher, son of the landowner and entrepreneur Sebastian Hensel, brother of the mathematician Kurt Hensel, grandson of the composer Fanny Mendelssohn and the painter Wilhelm Hensel, and a descendant of the philosopher Moses Mendelssohn.Hensel was born in Groß-Barten near Königsberg, Prussia and became a professor of philosophy at Heidelberg and Erlangen, where he taught until 1928.