He is married to Maria Victoria Dominique Francesca Xavieria van Rifflart Markgravin van Itter.
They got married on October 7, 1769, he was 30 years old.
Child(ren):
Bron: http://genealogics.org/getperson.php?personID=I00192330&tree=LEO
en:
Bulletin et annales de l'Académie d'Archéologie de Belgique, Volume 2, Froment, 1844, Pag. 396
https://books.google.nl/books?id=d5RJAAAAcAAJ&pg=PA397&lpg=PA397&dq=eustache+Aoust+1813&source=bl&ots=sCuo42vy3_&sig=oN8UQi-eQj6HMBs763IXzjh9Q0Q&hl=nl&sa=X&ved=0ahUKEwjQuOC6oILOAhXFWRQKHYpkA4cQ6AEILjAD#v=onepage&q=eustache%20Aoust%201813&f=false
The data shown has no sources.