- Born on October 13, 1843
- Deceased on April 26, 1933, at the age of 89 years
Parents
- Alfred du Breuil-Hélion de La Guéronnière (1811 - 1884), homme politique, publiciste
- Sylvie Anne de Brettes (1809 - 1900)
Family
- Married with Georg Petrovitch d'Alexeieff