Wallerant Vaillant (after) ( 1623 - 1677 ) was a Dutch painter. Wallerant Vaillant (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 50.57 USD for PORTRAIT in 2005 to 3136.82 USD for Portrait of two young boys, before an open landscape in 2009 , based on the size and medium of the artwork.