I found this weekly art challenge during September 2016, it is hosted by @StudioTeaBreak on Twitter. These are my interpretations of these portraits.
Queen Victoria miniature by Guglielmo Faija, 1856
Portrait Of Doctor Felix Rey by Van Gogh 1889
Caubvick of Labrador, by an unknown English artist, around 1772
Painting of Thomas Alexandre Dumas by Olivier Pichat
The Ugly Duchess (c. 1513), by Quentin Matsys