"Toba people (also referred to as Batak Toba people or often simply "Batak") are the most numerous of the Batak people of North Sumatra, Indonesia, and ...
often considered the classical 'Batak', most likely to willingly self-identify as Batak. The Toba people are found in Toba Samosir Regency, Humbang Hasundutan Regency, Samosir Regency, North Tapanuli Regency, part of Dairi Regency, Central Tapanuli Regency, Sibolga and its surrounding regions. The Batak Toba people speak in the Toba Batak language and are centered on Lake Toba and Samosir Island within the lake. Batak Toba people frequently build in traditional Batak architecture styles which are common on Samosir. Cultural demonstrations, performances and festivities such as Sigale Gale are often held for tourists." - (en.wikipedia.org 10.08.2021)