William

William is the husband of Helen, father of Nana Heffley, and Greg and his siblings' great-grandfather. He only appears in the family tree in Diary of a Wimpy Kid: Do-It-Yourself Book. It is unknown if he is still alive, but he is probably not.

Appearances

 * Diary of a Wimpy Kid: The Ugly Truth (First appearance) (cameo)
 * The Wimpy Kid Do-It-Yourself Book