The father of the term entrepreneur

Richard Cantillon was a French Irish economist who first coined the term entrepreneur in 1723.  While you may think an entrepreneur is someone who makes iphone apps, it's anyone who has known expenses and unknown income. 

The entrepreneur pays a certain price for products and services to resell them at an uncertain price in the market.
— Richard Cantillon, Essay on the General Nature of Commerce, 1723
l’entrepreneur achète des produits et services à un prix certain pour le revendre à un prix incertain sur le marché
— Richard Cantillon, Essai sur la Nature du Commerce en Général, 1723