Almost all of Grampa's biographical information is supplied by himself and seems to be made up, although this could be likely due to his old age. Many of his stories seem to be wildly inaccurate, often physically or historically impossible, and occasionally inconsistent even with each other, suggesting that Grampa is quite senile. It is unknown where Grampa was born. He claims that he came to America as a boy from the "old country", but he cannot remember which country it was, although most likely it was the United Kingdom or Ireland. Grampa was raised in New York City with his parents, Orville J. Simpson and Yuma Hickman. He gives his age as 83 in the Season 17 episode "Million Dollar Abie," while in "Grampy Can Ya Hear Me" (season 29), the family celebrates his 87th birthday, although he is canonically 83. In the Season 25 episode "The Winter of His Content," Homer states that Grampa's father is still alive. Due to the show's floating timeline, his age remains the same over the years, and newer episodes still depict him as a World War II veteran.
Almost all of Grampa's biographical information is supplied by himself and seems to be made up, although this could be likely due to his old age. Many of his stories seem to be wildly inaccurate, often physically or historically impossible, and occasionally inconsistent even with each other, suggesting that Grampa is quite senile. It is unknown where Grampa was born. He claims that he came to America as a boy from the "old country", but he cannot remember which country it was, although most likely it was the United Kingdom or Ireland. Grampa was raised in New York City with his parents, Orville J. Simpson and Yuma Hickman. He gives his age as 83 in the Season 17 episode "Million Dollar Abie," while in "Grampy Can Ya Hear Me" (season 29), the family celebrates his 87th birthday, although he is canonically 83. In the Season 25 episode "The Winter of His Content," Homer states that Grampa's father is still alive. Due to the show's floating timeline, his age remains the same over the years, and newer episodes still depict him as a World War II veteran.