According to the genealogy of Choho-ji keizu (the genealogical table of Choho-ji Temple) that SAKANOUE no Haruko had built, family tradition was handed down to the Sueyoshi clan from the family of the Hirano clan, and the family tree of the Sueyoshi clan, the Hirano clan originated from SAKANOUE no Yukimatsu (Yukimasu HIRANO), Akitajo no suke Gon no kami, who was the child of SAKANOUE no Minebon, Kiyomizu-dera betto (Chief Priest at Kiyomizu-dera Temple).
坂上春子創建の長宝寺の寺譜や平野氏の一族の末吉氏に伝わる家伝や末吉氏系図によると、坂上広野の孫で清水寺別当の坂上峯盆の子の秋田城介権守の坂上行松（平野行増）を祖とするという。