He is married to Maria Anna Josepha Rupertine Anthonia Francesca Ernestine Crescen van Arco.
They got married on September 11, 1796, he was 48 years old.
Child(ren):
Bron: http://genealogics.org/getperson.php?personID=I00072471&tree=LEO
en: http://geneall.net/de/name/598597/josephe-franccois-de-bertrand-de-la-perouse-graf-von-st-rhemi/
The data shown has no sources.