Abraham Simpson II

Abraham Jedediah "Abe" Simpson II, also known as "Grifty McGrift" and commonly known as "Grampa Simpson", or simply as "Grampa", (born May 4, 1925) is the patriarch of the Simpson family, the father of Homer, Herbert and Abbie Simpson, father-in-law of Marge Simpson, and the paternal grandfather of Bart, Lisa, and Maggie Simpson. He is also the ex-boyfriend of Jacqueline Bouvier, his daughter-in-law's mother.