Anne-Charles de Gontaut-Biron
Marie-Antoinette de Gontaut-Biron
Her married name became Dewael.
Child of Marie-Antoinette de Gontaut-Biron and Jean-Guy Dewael
- Arnaud Dewael b. 29 Mar 1962
Jean-Guy Dewael
Child of Jean-Guy Dewael and Marie-Antoinette de Gontaut-Biron
- Arnaud Dewael b. 29 Mar 1962
Arnaud Dewael
Vital de Gontaut-Biron 
Children of Vital de Gontaut-Biron and Renee de la Ferte Meun
- Louis-Antoine de Gontaut-Biron+ b. 24 Mar 1927
- Elisabeth de Gontaut-Biron+ b. 2 Sep 1928
Renee de la Ferte Meun
Her married name became de Gontaut-Biron.
Children of Renee de la Ferte Meun and Vital de Gontaut-Biron
- Louis-Antoine de Gontaut-Biron+ b. 24 Mar 1927
- Elisabeth de Gontaut-Biron+ b. 2 Sep 1928
Louis-Antoine de Gontaut-Biron
Children of Louis-Antoine de Gontaut-Biron and Isabelle de Pontac
- Christophe Jean Vital de Gontaut-Biron b. 22 May 1966, d. 22 May 1966
- Sybille Barbara de Gontaut-Biron b. 11 Dec 1967
- Alexandra de Gontaut-Biron b. 17 Oct 1969
Isabelle de Pontac
Her married name became de Gontaut-Biron.
Children of Isabelle de Pontac and Louis-Antoine de Gontaut-Biron
- Christophe Jean Vital de Gontaut-Biron b. 22 May 1966, d. 22 May 1966
- Sybille Barbara de Gontaut-Biron b. 11 Dec 1967
- Alexandra de Gontaut-Biron b. 17 Oct 1969
Christophe Jean Vital de Gontaut-Biron 
Sybille Barbara de Gontaut-Biron
