Oswald J. "Old Tut" Simpson is the great-grandfather of Homer Simpson. His brother Hugo also spent most of his life incarcerated and chained up in their parents’ attic and only fed a bucket of fish heads much like Old Tut's great-great-grandson, Hugo Simpson II.
| Oswald J. "Old Tut" Simpson | |
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| Gender | 
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| Status | 
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| Alias(es) | Great-Great-Grampa Simpson |
| Hair | Grey |
| Age | 64 (at death) |
| Occupation | Pocket watch tinkerer |
| Location | The Old Country |
| Relatives | Parents: Abraham Simpson I and Gabby Crouse Siblings: Lou Simpson, Hugo Simpson I, Gaston Simpson and Dulcine Simpson Grandparents: Virgil Simpson and Mabel Simpson Paternal Half-Aunt: Eliza Simpson Paternal Half-Uncle-by-Marriage: Milford Van Houten Paternal Half-Cousin: Kirkedemious Van Houten Parents-in-Law: Horatio Dinsdale and Edwina Forayter Siblings-in-Law: Udell "Spunky" Dinsdale and Zorina Ovadia Wife: "Happy" Dinsdale Children: Orville Simpson, Boris Simpson, Twitta Simpson, Elrita Simpson, Bonita Simpson and Abigail Simpson Daughter-in-Law: Yuma Hickman Grandchildren: Abraham Simpson II, Bill Simpson, Chet Simpson, Cyrus Simpson, Hubert Simpson, Hortense Simpson and Tyrone Simpson Granddaughters-in-Law: Cyrus' 15 wives Ex-Granddaughters-in-Law: Mona Simpson, Rita LaFleur, Amber Simpson, Selma Bouvier and Tallulah Winkelman Great-Grandchildren: Homer Simpson, Herbert Powell, Abbie Simpson, Omar Simpson, Dr. Simpson, Millionaire Actor and Valerie Rothman Great-Grandson-in-Law: Dave Rothman Great-Granddaughters-in-Law: Marge Simpson and Marnie Simpson Great-Great-Grandchildren: Bart Simpson, Lisa Simpson, Maggie Simpson, Stanley Simpson, Brit Simpson, Lily Simpson and Magpie Simpson Adoptive-Great-Great-Granddaughter/Ex-Adoptive-Step-Great-Granddaughter: Ling Bouvier Great-Great-Grandson-in-Law/Half-First-Cousin-Six-Times-Removed (Future): Milhouse Van Houten Ex-Great-Great-Granddaughter-in-Law (Future): Jenda Great-Great-Great-Grandchildren (Future): Kirk Simpson, Picard Simpson, Zia Simpson (also half-1C7R) and Maggie Simpson, Jr. |
| First Appearance | The Simpsons Uncensored Family Album A Father's Watch (first physical appearance) |