Tyrone Simpson

Uncle Tyrone is a cynical elderly (oldest) Simpson relative who lives in Dayton, Ohio.

Relatives
Judging from his age and appearance, he is most likely Abe's big brother making him a great-uncle to the Simpson family.

Info
The family intends to visit him during his birthday but he hasn't been seen since.

Personality
When the Simpsons were singing "Happy Birthday" to him, he said "Why won't I die?", judging from that, we can most likely presume he is bitter and depressed.