Numbering an estimated eight million people, they comprise perhaps six independent, but closely - related, ethnic groups ​ — the Toba, the Simalungun, the Karo, the Dairi, the Angkola, and the Mandailing.
Menurut perkiraan, jumlah mereka delapan juta orang, yang terdiri dari enam kelompok etnik yang terpisah namun masih berkerabat ​ — Toba, Simalungun, Karo, Dairi, Angkola, dan Mandailing.