Although a family line constituted by a lineage of eldest sons was normally called Soke, a family line that was constituted by a lineage of eldest sons but was not allowed to govern the whole family for some reason was called Chakuke.
いわゆる嫡流の家柄・家系を宗家というが、嫡流でありながら何らかの事情で一族を統率するいわゆる嫡宗権を失った血筋を嫡家といった。