The moderately high frequency (~18%) of T1b* chromosomes in the Lemba of southern Africa supports the hypothesis of a West Asian origin for their paternal line.

Haplogroup T is found at exceptionally high levels amongst the Dir and Isaaq Somali clans in Somaliland,[a][7] Djibouti, and Ethiopia.

[8][9] it is also found at relatively high levels in specific populations in other parts of the world especially amongst Arabs from UAE in South Eastern Arabia T-M184 spikes at 19% on FTDNA.

These include Kurru, Bauris and Lodha in South Asia; among Toubou in Chad; and in a significant minority of Rajus and Mahli in South Asia; general Somalis, southern Egyptians and Fula (Fulbe) in north Cameroon; people from the Chian, Aquilani, Saccensi, Ibizan (Eivissenc) and Mirandese regions in Europe; Zoroastrians, Bakhtiaris, Assyrians and Iraqi Jews in the Middle East.

[5] Its believed that maximal worldwide frequency for haplogroup T-M184 peaks amongst the Somaliland males of the Dir sud-clan Surre but no data is known to support this claim according to SomaliY.com T is only 9% in greater Somalia (Iacovacci et al.

[8] Luis et al. (2004) suggest that the presence of T on the African continent may, like R1* representatives, point to an older introduction from West Asia.

[11] T-M184, which is relatively rare in other Near Eastern populations, as well as in three ... Armenian collections tested here, represents the most prominent [patrilineal] descent in Sasun, comprising 20.1% of the samples.

According to Mendez et al. (2011), "the occurrence in Europe of lineages belonging to both T1a1 (old T1a) and T1a2 (old T1b) subclades probably reflects multiple episodes of gene flow.

[12] The Russians from the southwest were from the following cities: Roslavl, Livny, Pristen, Repyevka, and Belgorod; and Kuban Cossacks from the Republic of Adygea.

Although it is rare in modern populations, T1* has been found in a Berber individual from Tunisia, a male in Syria, and one sequence among ethnic Macedonians in Macedonia.

In 2009, a male with the surname Metaxopoulos and a Pontic Greek background was reported to be T-L162(xL208) – according to the Y-Chromosome Genome Comparison Project administered by Adriano Squecco.

[citation needed] Greeks from the Fatsa (originally "Φάτσα") reportedly migrated in antiquity from Sinope, which was itself colonised by Ionians (from Miletus).

[176] Fossils excavated at the Late Neolithic site of Kelif el Boroud in Morocco, which have been radiocarbon-dated to around 3,000 BCE, have been found to belong to haplogroup T-M184.

[252] A 2018 study[2] conducted by scholars from Tel-Aviv University, the Israel Antiquities Authority and Harvard University had discovered that 22 out of the 600 people who were buried in Peki'in cave from the Chalcolithic Period were of both local Levantine and Zagros[286] area ancestries, or as phrased in the paper itself: "Ancient DNA from Chalcolithic Israel reveals the role of population mixture in cultural transformation," the scientists concluded that the homogeneous community found in the cave could source ~57% of its ancestry from groups related to those of the local Levant Neolithic, ~26% from groups related to those of the Anatolian Neolithic, and ~17% from groups related to those of the Iran Chalcolithic.".

This homogeneity is evident not only in the genome-wide analyses but also in the fact that most of the male individuals (nine out of ten) belong to the Y-chromosome Haplogroup T (Y-DNA), a lineage thought to have diversified in the Near East.

Elite marathon runners from Ethiopia were analysed for K*(xP) which according to the previously published Ethiopian studies is attributable to the haplogroup T[291] According to further studies,[5] T1a1a* (L208) was found to be proportionately more frequent in the elite marathon runners sample than in the control samples than any other haplogroup, therefore this y-chromosome could play a significant role in determining Ethiopian endurance running success.

[292] The ruling family of the Kingdom of Bahrain is the House of Khalifa (Arabic: آل خليفة, romanized: Āl Khalīfah) is confirmed West Asian Y-DNA Haplogroup T-L206 subclade of P77*.

[citation needed] The house belongs to the Utab tribe, which is part of the larger Anizah tribal confederation, that migrated from Central Arabia to Kuwait and then ruled all of Qatar.

The Y-chromosomal complement of the Jefferson male line was studied in 1998 in an attempt to resolve the controversy over whether he had fathered the mixed-race children of his slave Sally Hemings.

This confirmed the body of historical evidence, and most historians believe that Jefferson had a long-term intimate liaison with Hemings for 38 years, and fathered her six children of record, four of whom lived to adulthood.

Jefferson grandchildren had asserted in the 19th century that a Carr nephew had been the father of Hemings' children, and this had been the basis of historians' denial for 180 years.

Family Tree DNA, found that the Jefferson T patrilineage belongs to T-BY78550 a subclade of T-PF7444 which is likely of MENA Middle Eastern North African Origins.

α Jobling and Tyler-Smith 2000 and Kaladjieva 2001 β Underhill 2000 γ Hammer 2001 δ Karafet 2001 ε Semino 2000 ζ Su 1999 η Capelli 2001