Wikisimpsons - The Simpsons Wiki
The Simpson family is one of the main families in Springfield, as well as the protagonist family of The Simpsons. The first known Simpson was Sven. Many families have married in to the Simpson family and the Simpsons have in turn married into many. Through marriages such as this, it is possible to trace a link between one of the states richest and well-known family, the Burns'.
The first known Simpson was Sven. He married Claretta Elthridge and had two children. One of them, Rupert, married Winifred Running Goat, a Native American-Indian. They had five children, which included Trixie and Garwood. Trixie married Gaylord Stemple and they had three sons. Garwood married Clowta Stillman, and they had four offspring. Howland married Gabby Crouse and then he had five children. They were Lou, Dulcine, Hugo, Gaston and Tut. Lou married Zorina Ovadia and they had three children: Eckhardt, Bob and Twyla. Twyla married Woody Schedeen and had the daughters Fernice and Ingrid, and Eckhardt married Griselda Johnson and had two sons and two daughters named Verna, Vern, Eckhardt II, and Lotus.
Tut Simpson married "Happy" Dinsdale and they had four children, including Orville. Orville married Yuma Hickman. They had Abraham Simpson and his brothers. They moved back to the US and Abraham met Mona. They had Homer, who married Marge Bouvier and had Bart, Lisa, and Maggie. Abe also had an affair with an unknown woman, which resulted in Herb, who was adopted by the Powell family.
 Family tree
 Relatives with an unknown or unclear position in the family tree
 Non-canon relatives