Ferdinand Juan Gurney also known as Grandpa Gurney or Mr. Gurney was the husband of Alvarine Gurney, the father of Gladys Gurney, Lou Gurney and Jacqueline, the father-in-law of Clancy Bouvier, and the maternal grandfather of Selma, Patty and Marge Bouvier. He is also the maternal great-grandfather of Bart, Lisa and Maggie Simpson and Homer Simpson's grandfather-in-law. He was also the son of Thomas and Ingrid Gurney


He died when Marge was 7. His natural hair color is brown but he dyed it to blue. Like his wife, he didn't approve of his daughter's marriage to Clancy Bouvier.


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