From http://www.acadian-home.org/leblanc-family-history.html
This is what Stephen White (a LeBlanc descendant), Genealogist Moncton University Centre for Acadian Studies, states in his recently published Dictionnaire Généalogique des Familles Acadiennes:
i. The place of origin and the ancestors of Daniel LeBlanc are unknown. Some have wanted to believe that Daniel descended from a noble family of Dauphiné, based on research by d'Entremont (J. Alfred LeBlanc - the Origins of the LeBlanc Family, "Footprints of the Exiled: A LeBlanc Family Newsletter", vol I, 1986, p. 7), but the family proposed (to René to Alphonse to Pierre) is a Blanc or deBlanc family, rather than LeBlanc (see MM. de La Chenaye-Desbois & Badier, "Dictionnaire de la noblesse, 3e édition, Paris, 1863, vol. III, p. 314-317).