Lillian Chalmers (Novel Series)

Lillian was the wife of David Chalmers and the mother of April Chalmers and David Chalmers.

Location Unkown
Almost nothing is known about Lillian's life. It is known that she was married with David Chalmers, and with him they got the kids, April and Tara. When April and Tara grew up, the four of them created a band. After Lillian's death, the remaining three continued with the band.

The Walking Dead: Rise of the Governor
Lillian was mentioned by David Chalmers while sleeping. In his sleep he thought April was Lillian, and kept calling out for her. Moments before David died, he mentioned Lillian.

Death
It is unknown how Lillian died, although she died before the apocalypse, and might, because of that, had died naturally.

Trivia

 * Lillian is one of the few characters with a continuing nickname.