John Alexander ( 1690 - 1757 ) was a painter. John Alexander s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 512.75 USD for HALF LENGTH PORTRAIT OF LADY JANE KEITH in 2010 to 4246.08 USD for CONFUSED COUPLE WITH TOO MUCH TO EAT in 2013 , based on the size and medium of the artwork.