Evie is a character mentioned in "Worth" in AMC's The Walking Dead. She is Carl's aunt whom he mentioned in his letter to Rick. It is unknown if she is Rick's or Lori's sister or if she is also Judith's aunt.
Nothing is known about Evie's life before or as the outbreak began.
Whilst Rick reads Carl's letter, Carl mentioned his Aunt named Evie. It's unknown whether Evie survived the apocalypse.