Ignacio Nieves Beltrán Nefero ( 1920 - ) is a Tanzanian painter. Ignacio Nieves Beltrán Nefero s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1164.3 USD for Retrato de Rodr√≠guez Lozano in 2008 to 1889.12 USD for Mujer con rebozo verde in 2009 , based on the size and medium of the artwork.