 It may be a reference to the then French village of Courcelles, in today's Belgium.The village is located near the site of the Battle of Grandson, a major defeat for Charles the Bold, where the sitter may have been killed in 1476 (he is last mentioned in records in 1475).Giving the similarity of the crest to that of his father's, as well as the significance of various letterings, many art historians see it as indicative of the illegitimate sitter's aspiration to be recognised as Leonello's son, with all the entitlements and historical recognition such acceptance would entail.