[Spoiler]
It is an early version of the Edwin Odesseiron portrait from Baldur's Gate; most likely that is.
http://withinamnesia.deviantart.com/art/Early-Version-Of-Edwin-Odesseiron-s-Portrait-568392934?ga_submit_new=10%3A1445828312[/Spoiler]
WE NEED TO FIND THIS PORTRAIT!