Marquis d'Aoust
Marquis d’Aoust is mentioned in the provenance of the painting Rest on the flight to Egypt by Marcel Koffermans [Coffermans] (Schloss German no. 110/ French no. 133).
Further research indicates that this provenance reference is maybe related to Jules Edmond Joseph marquis d’Aoust (1817-1886) who was a composer, politician, and Mayer of Cuincy (1856-1885).