Grandpa Gonzo Cosma is Cosmo's grandfather. He and his wife, Grandma Cosma, are the first known members of the Cosma family.
Character
He is the father of Papa Cosmo, the father-in-law of Mama Cosma and the grandfather of Schnozmo and Cosmo Cosma. He is also the great-grandfather of Poof. Little is known about him, for he has never truly appeared in an actual episode.
Description
He resembles the other members of Cosmo's family, but is nearly bald and has only one tooth. It is possible he may have had green hair when he was younger because of his eye color and all of his decendents (besides Poof) has green hair