Guillaume de Polignac
- Born on October 30, 1847
- Deceased on January 30, 1850, at the age of 2 years
Parents
- Armand XXV de Polignac (1817 - 1890), prince de Polignac, propriétaire, capitaine de l'armée bavaroise
- Amélie de Berton des Balbes de Crillon (1823 - 1904)