Maremochi, the second son of Mareyoshi, was given Kiranosho, Tosa Province (Haruno-cho, Kochi City, Kochi Prefecture) by Yoritomo, and then commenced calling himself, 'Hachiro KIRA,' this is the origin of their family establishment (In another study, the family was descended from Takamori, the first son of Mareyoshi.)
希義の次男希望が、頼朝より土佐国吉良荘（高知県高知市春野町）を賜り、「吉良八郎」を称したことに始まる（一説には希義の長男隆盛の系統ともいう）。