There are two Miyoshi clan lineages, and historical sources clearly indicate that the lineage that inherited Kidendo (history) and the other that inherited Sando (mathematics) were distinct from each other.
三善氏には2つの系統があり、紀伝道を世襲した三善氏と算道を世襲した三善氏は別系統であったのは史料等で明らかである。