François David Soiron ( 1748 - 1813 ) was a Swiss painter. François David Soiron s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 3580.65 USD for Frauenbildnis. Miniatur. in 2004 to 5182.52 USD for M√§nnerbildnis. Miniatur. in 2004 , based on the size and medium of the artwork.