Tyap is a regionally important dialect cluster of Plateau languages in Nigeria's Middle Belt, named after its prestige dialect. It is also known by its Hausa exonym as Katab or Kataf. It is also known by the names of its dialectical varieties including Sholyio, Fantswam, Gworok, Takad, "Mabatado" (Tyap 'proper'), Tyeca̱rak and Tyuku (Tuku). According to Blench (2008), Jju—with more speakers—appears to be a form of Tyap (although its speakers are ethnically distinct). Distribution Native Tyap speakers are primarily found in the local government areas of Jema'a, Kaura and Zangon Kataf, although pockets of speakers are also found in Kachia and Kauru in southern Kaduna state, and Riyom (especially Takad speakers) in Plateau State of Nigeria. There are also large speaking communities in Kaduna South and Chikun Local Government Areas of the state. Skoggard (2014) presented the distribution of the Atyap (Katab) people in Nigeria to include: Niger, Nasarawa, Kaduna states and the FCT. Classification and dialects Meek (1931:2) suggested that the Katab (Atyap), Morwa (Asholyio), Ataka (Atakad) and Kagoro (Agworok) speak a common tongue and may be regarded as one; and later on, McKinney (1983:290) commented that the Kaje (Bajju) should likewise be included with the above, due to the linguistic and cultural similarities shared by them. Murdock (1959) classified Kagoro (Gworok) and other dialects comprising the current Tyap language group as "Plateau Nigerian", in his "Semi-Bantu" branch of "Bantoid subfamily" of "Negritic Stock". Tyap and Jju were placed by Greenberg (1963) under the "Plateau II" branch of the Benue-Congo language family. Later on, Gerhardt (1974) made a reconstruction of the branch, assigning it as "proto-Plateau". Again in 1989, Gerhardt placed Tyap and Jju under the South-Central subgroup, Central group, Plateau branch of Platoid, a division of the Benue-Congo languages. Achi (2005) stated that the Atyap speak a language in the Kwa group of the Benue-Congo language family. However, according to Bitiyong, Y. I., in Achi et al. (2019:44), the Kataf Group (an old classification) to which Tyap language belongs, is a member of the eastern Plateau. He went further to suggest that by utilizing a glotochronological time scale established for Yoruba and Edo languages and their neighbours, the separation of the Kataf Group into distinguishable dialects and dialect clusters would require thousands of years. Also mentioned was that, noting further that this indicates that He thereafter summarized that the implication for Tyap is that it has taken thousands