Léon de Joannis

• 
• Born on May 20, 1835 in Neuchâtel
• Deceased on June 9, 1892, at the age of 57 years

Parents

• Henri Jean Baptiste de Joannis (1797 - 1872)
• Julie Caroline Augustine de Rougemont (1814 - )

Family

• Married on June 15, 1863 in Niederbronn-les-Bains, with Octavie de Dietrich (1847 - ), issuing
  • Jeanne Elisabeth (1877 - 1961)
  • Octavie Amélie (1881 - 1971)