He apparently is of french nobility.
This appears to be his son,
http://anom.archivesnationales.culture.gouv.fr/osd/?dossier=/collection/INVENTAIRES/Ministeres/SEM/E/&first=241_186A/FRCAOM06_COLE_241186A_0332&last=241_186A/FRCAOM06_COLE_241186A_0344&title=Espinassy,+Antoine+Marie+Joseph+d%27,+capitaine+en+premier+d%27artillerie+%C3%A0+l%27%C3%AEle+de+France,+puis+%C3%A0+Saint-Domingue,+devenu+g%C3%A9n%C3%A9ral+en+1797+1757/1829
Nice!, Any chance you can find records for his wife and her brother. Michael Antione Garoutte?
https://www.wikitree.com/wiki/Garoutte-128
(This profile needs pared down and verified)