"Portrait of a lady in a blue dress, half-length", Antoine Pesne
Presumed portrait of bernhardine felizitas von westerholt-lembeck (1695-1757)
identification proposed by user ecummenic (talk) based on the comparison with a portrait of that lady (see image below). Object Type: painting. Date: 18th century. Dimensions: height: 81.3 cm (32 in); width: 61 cm (24 in). Medium: oil on canvas. Collection: Unidentified location. Follower of Antoine Pesne - Portrait of a lady in a blue dress