Groening, a former high school English teacher and the mother of series creator Matt Groening, died April 22 in her sleep. Groening hasn't commented publicly about her passing.
Groening's maiden name was Wiggum — a nomenclature that belonged to The Simpsons' beloved police commissioner Clancy Wiggum and his thick-headed son Ralph Wiggum.
Groening's family — including his father, Homer, and his sisters, Lisa and Maggie — was a clear influence for the show. Groening's father, Homer, passed away in 1996. Another sister, Patty — who inspired the name of the character Aunt Patty — died this past January.