Who was janies grandfather their eyes were watching god?

Answer 1

His name is unknown, but Janie's grandmother, Nanny, was a slave who was raped by her owner

Answer 2

Janie's grandfather in "Their Eyes Were Watching God" was named Nanny's father and his name was Colonel Edmond. He was a white man who impregnated Nanny's mother, a slave, resulting in Nanny being born mixed-race. Nanny's father later gave her the freedom to marry a kind man, but she was still left a widow and destitute, leading to her determination to secure a better life for Janie.