Guillaume François Antoine, Marquis de l'Hôpital was a French mathematician. His name is firmly associated with l'Hôpital's rule for calculating limits involving indeterminate forms 0/0 and ∞/∞. Wikipedia
Born: 1661, Paris, France
Died: February 2, 1704 (age 43 years), Paris, France
Parents: Elisabeth Gobelin and Anne-Alexandre de l'Hôpital
Education: Academy Science
Spouse: Marie-Charlotte de Romilley de La Chesnelaye (m. 1688)
Full name: Guillaume François Antoine de l'Hôpital
Books
Analyse des Infiniment Petits pour l'Intelligence des Lignes Courbes
1696
An analytick treatise of conick sections
The Method of Fluxions Both Direct and Inverse: The Former Being a Translation from the Celebrated Marquis de L'Hospital's Analyse Des Infinements [sic] Petits: and the Latter Supply'd by the Translator, E. Stone, F.R.S.
The Method of Fluxions Both Direct and Inverse
1730
The Method of Fluxions Both Direct and Inverse. The Former Being a Translation From the Celebrated Marquis de L'Hospital's Analyse Des Infinements [sic] Petits: And the Latter Supply'd by the Translator, E. Stone, F.R.S