In a narrow meaning, the Suino family refers to the family line descended from the twelfth generation descendant of Motokuni, Motosada HIRATA who lived during the Sengoku Period (Period of Warring States)--Motosada's son Motokiyo--Motokiyo's adopted son Mototada.
ただし、狭義においては戦国時代(日本)の平田職定（職国12代目の子孫）の子平田職清及びその養子平田職忠の系統を指す。