He is married to Maria Claire Josepha van Baudeghuin-Sainghin Barones van Westouter.
They got married on June 4, 1770, he was 22 years old.
Child(ren):
Bron: https://gw.geneanet.org/oaudeoud?lang=en&pz=olivier+gonzague+marie+yves&nz=audeoud&p=francois+philippe+nicolas+ladislas&n=de+diesbach+de+belleroche
The data shown has no sources.