Coat of arms Blanchier, de Sarlat, Fayrac, Lostanges. Redrawn after sources: 
Hozier[1] andFroidefond[2] or alsohttps://archive.org/details/armorialdelanob00boulgoog/page/n91/mode/2up?q=Isaac+d%27Abzac+Boissi%C3%A8re 

De la Coussière[3]
This cour of arms definitly has a Chevron d'or (gold) and three roses(lin 1789 stars) in silver
Own work
Nicoasc