Peter von Portugal
The physical dissimilarities from other portraits of Anthony of Burgundy has made some critics tentatively identify the sitter of this portrait as John of Coimbra, Prince of Antioch, knight of the Golden Fleece who was sent into exile in Burgundy after his father Infante Peter, Duke of Coimbra was killed in action in the Battle of Alfarrobeira when an arrow pierced his heart (thus providing a plausible explanation for the meaning of the arrow held by the sitter).