Genealogy
Before his ascension to the Chrysanthemum Throne, his personal name (his imina) was Tokohito-shinnō (言仁親王). He was also known as Kotohito-shinnō.
His father was Emperor Takakura. His mother, Taira no Tokuko (平徳子), second daughter of Taira no Kiyomori (平清盛), was later referred to as Empress Dowager Kenrei (建礼門院, Kenrei-mon In).
Read more about this topic: Emperor Antoku