- Born on May 17, 1901 in Vienna
- Deceased on August 13, 1968, at the age of 67 years
Parents
- Hubert Karl de La Fontaine und d'Harnoncourt-Unverzagt (1850 - 1920)
- Juliana Mittrowsky von Mitrowitz (1871 - 1936)
Family
- Married in 1932, with Sarah Carr (1903 - 2001), issuing
Anne (1943 - 2008)