The McDuck Ancestor in the Portrait was a male anthropomorphic duck.
Description[]
In 1989, Scrooge McDuck found a portrait of this goatee-sporting ancestor of his in Scottish garb in his attic. He brought it to his recent purchase, Sir Harold's Manor, where he hung it to cover up a crack in a wall.
Behind the scenes[]
The portrait of this Scottish duck appears in th 1989 story The Shy Ghost.
The character has some similarity to Scotty McDuck, and might be him. Although Scotty is mostly considered noncanon.