Jake's Older Sister

Daria fandom got a surprise in the very first fan-conducted interview with series creator Glenn Eichler, early in 2005, when it was revealed that Jake Morgendorffer was supposed to have had an older sister. Fans of the series were long aware of clues that Jake was not an only child, such as Ruth Morgendorffer’s comment in “Jake of Hearts” that her husband “gave me fifty dollars a month for my allowance. Allowance! As if keeping his house spotless and raising his children was only worth the price of a couple of girdles!” In The Daria Diaries is a photo of Helen, Quinn, and Daria dressed to go to the wedding of one of Daria's cousins, but this cannot be the cousin who was married in the episode, "I Don't," as the Morgendorffers have not yet moved to Lawndale and are assumed to still be in Highland. Since Erin Chambers is the only cousin Daria has on her mother's side, Daria thus has one cousin on her father's side, who would be the child of one of her father's siblings.

Little is known of this unseen character, though much is speculated. Jake himself never once mentions this sister in canon.

Prior to the Glenn Eichler interview, Richard Lobinske postulated that Jake had an older brother, Bruce Morgendorffer, two years Jake's senior. Background on Bruce appears in "Silver Lining" in the Falling Into College series.