Étienne de La Vallée Poussin
- Born on November 23, 1903 in Brussels
- Deceased on October 4, 1996, at the age of 92 years
Parents
- Xavier de La Vallée Poussin (1865 - 1951), fonctionnaire
- Éveline Marie Emmanuelle Ghislaine de Francquen (1870 - 1949)