Jefferson Jones

Jefferson Jones (nee Madden), also known as the Mad Hatter, is a character on ABC's Once Upon a Time. He is the brother of Alice Jones and Alexander Jones husband of Killian Jones and the mother of Grace Jones Violet Jones and Harry Hook. He is portrayed by Sebastian Stan.

Jefferson is based on the Hatter from the novel, Alice's Adventures in Wonderland, and the Mad Hatter from the Disney film Alice in Wonderland.