Originally: a member of the Susquehannock people or of any of several related Northern Iroquoian groups of interior Pennsylvania. In later use: a member of an Iroquois Indian group, mostly Senecas, who were not affiliated with the League of the Iroquois and whose modern descendants are the Oklahoma Seneca-Cayuga.
Of, relating to, or inhabited by any of these peoples.
Mid 17th century. From Dutch Minquaas, plural from Northern Unami Delaware *ménkwe:w from proto-Eastern Algonquian *me:nkwe:w.