Iorgos "Papouli" Katsopolis (played by Jack Kruschen) is Jesse and Pam's grandfather and Nick's father. He is an elderly Greek man; well, more of a child in an old man's body. Visiting from Greece, he is portrayed as a jolly, friendly man with a failing memory, mistaking each of the girls for their younger sister. At first, Michelle calls Papouli 'Grandpa', too which he responds by telling her to call him 'Papouli', his reasoning being that 'Grandpa means an old man with grey hair.' Whereas Papouli 'also means an old man with grey hair, but sounds so much better'.