The Simpsonsfamily tree appears in the book the Simpsons Uncensored Family Album. The Simpson family is on the inside of the front cover, while the Bouvier family (Marge's side of the family) apears on the inside of the back cover. This page shows a reduced version of both trees. An interesting note, Charles Montgomery Burns is included in the Simpson tree, being a distant relative of Homer through at least two marriages. Homer is descended from Scandinavians and American Indians, while Marge is descended from the French. There are notable errors, as the book was published in 1991. Homer's mother's name was revealed in future episodes as Mona Simpson, not Penelope Olsen (or Simpson). Also, Marge's mother's name was revealed as Jacqueline Bouvier, not Ingrid Gurney (or Bouvier). An other interesting note, despite Amos Graycomb and Moselle Stemple marrying and having four children together, they are infact 3rd Cousins.
Family members are rarely seen in the show, other than frequent appearances of Abe, Patty and Selma, and occasional appearances of Herb and Mona. On one flash-forward episode, Maggie has grown up and has a daughter called Maggie Jr.
Among the things it reveals is the birth date of Bart Simpson (also the birthday of Hugo Simpson), as well as the familytrees of the Bouvier (MargeSimpson's ancestors) and Simpsonfamilies.
The Simpsontree can be found on the inside of the front cover, while the Bouvier family appears on the inside of the back cover.
Extended family members are rarely seen in the show, other than frequent appearances of Abe, Patty and Selma, and occasional appearances of Herb and Mona.
The Simpson nuclear family consists of Homer, Marge, Bart, Lisa, and Maggie.
It should be noted that while she is obviously a biological Simpson (aside from her appearance and personality, she was born only about a year after Grandpa's affair with her mother) she is not officially recognized by the family and never explicitly called a Simpson; the audience is merely left with a strong indication.
Uncle Hubert's funeral was attended by the family in the Tracey Ullman short, "The Funeral".