Jean-Baptiste Dortignacq was a French road bicycle racer between 1900 and 1910. Dortignacq won seven stages in four Tour de France events. He only competed in stage 4 of the first Tour de France in 1903, finishing 11th on the stage. In the yellow jersey at the 1905 Tour de France after stages 10–11 — 2 stages, July 28 to July 29, taking it from Louis Trousselier. Wiki link