Genealogy
Before his ascension to the Chrysanthemum Throne, his personal name (his imina); his name was simply Hikohito-shinnō (彦仁親王?).
He was the eldest son of Imperial Prince Fushimi-no-miya Sadafusa (伏見宮貞成親王) (1372–1456). His mother was Sachiko (幸子) (1390–1448), daughter of Niwata Tsuneari (庭田経有).
His father was the 3rd of the Fushimi-no-miya line and grandson of the Northern Pretender Emperor Sukō, making Go-Hanazono the great-grandson of Sukō and 3rd cousin to his predecessor, Emperor Shōkō. He was also the great-great-great grandson of Emperor Go-Fushimi. This is the second most remote relationship between an emperor and his successor after that between Emperor Go-Komatsu (both the sixth Northern Pretender and the 100th in the main line) and his predecessor in the official line, Emperor Go-Kameyama, who was his fourth cousin twice removed.
Read more about this topic: Emperor Go-Hanazono