In "Kishi Kezu" (a family tree of the Ki clan) ("Zoku-Gunsho Ruiju" Book (Book of The Library of Historical Documents, Continued)), an anecdote stated the heresy that he was the child of KI no Sueshige, the younger brother of Chogen.
『紀氏系図』（『続群書類従』本）には異説として紀季重の子・重源の弟とする説を載せている。