The Khas-Kirati peoples are an ethno-cultural group originating in the Vendriothos region (more commonly known as the Magarat region).
Historically, the term "Khas-Kirati" was often used by foreigners while referring to people from the Khas-Kirat Empire; ignoring its status as a multicultural entity. In addition to that, centuries of Kiratization resulted in most ethnic Argean Ipachis and Magarati Domans identifying themselves more as Khas-Kirati. Furthermore, any immigrant from Vendriothos regardless of their ethnicity, was often considered a Khas-Kirati in other nations. As such, the actual numbers of the Khas-Kirati peoples is hard to determine but it probably ranges anywhere from 55 to 60 million.
In general, the following groups are considered to be part of the Khas-Kirati identity:
Southern Khas - This term refers to groups who were initially Argean Ipachi but now speak Southern Khas languages and share similar culture with their Khas neighbors. Tharus, Dhanuks, Majhis and Rajbansis are considered to be Southern Khas.
Eastern Kirats - Further divided into Inner and Outer Kirats. The four Inner Kirati tribes are the Yakthungs (called Kirat-Limbu in North Argus and Gael), Khumbu-Rai, Yakkhas and Sunuwars. The term "Kirat" was initially used to identify these four tribes but they became quite influential enough (most of the Mahangs were Inner Kiratis) for all Xrevaro-descent groups in Vendriothos to be labeled as Kiratis. The Outer Kirats are Jirels (who established the Xiangu dynasty of Wellsia), Dhimals, Meches, Thamis, Yolmos, the Krātas of Mitravarta and the Kyrazhi of Kyrazakhstan. The Danuwars, who were historically an Argean Ipachi tribe, are nowadays considered to be Outer Kirats as well.
Western Kirats - The Western Kiratis are groups that historically filled the role of Gurkhas or mercenaries in other nations. This group includes the Tamus (who established Hangate of Tamuwan in Dragao do Mar), Puns (the largest Khas-Kirati tribe in Vendriothos population-wise), Chhantyals (the second largest ethnicity in Townside), Thakalis, Duras, Bhujels, Barams, Rautes and Kumals (who form a significant minority in Almorea). The Darai, yet another historically Argean Ipachi group, are nowadays considered to be Western Kirats.
Northern Kirats - This groups includes the Chuli people, Lepchas, Dolpos, Lhobas and Lhomis. All of these five are relatively isolationist mountainous tribes who inhabit different altitudes of the Chuli Mountain Range.
Central Kirats - This term is applied to Tamangs (who share much in common with Northern Kirats) and the Chepangs (who have historically ruled over various Western Kirati and Southern Khas peoples). The Tamangs of Second Tamsaling Hangate, along with the Yakthungs of Arun Valley, established the concept of "Magarati Peace" and foreign alliances. The Chepang-led Hangate of Chatha was one of the major colonial powers in the Isles.
Southern Kirats - Includes just the Newa people, who were historically identified as Kiratis but now share more in common with their Khas and Nyssic neighbors. Some of the clans within the Newa are said to be remnants of ancient Roendavarians.
The following groups are sometimes considered to be part of the "greater Khas-Kirati nation" (depending on who you ask):
Argean Ipachis - Though many other ethnic groups in Vendriothos can be considered Argean Ipachi; only the Kisans (best known as "rice-cultivators"), Kusundas (who have only one clan in existence and less than a dozen speakers), Jhangads and the Santhals (the so-called "fish-people" from Jaring) speak Ipachi languages nowadays.
Magarati Domans -