There are San, and there are Khoi, and then there are other Hunter-Gatherer groups which get lumped as "Khoisan". "A" and "B" both fall in this group, as does E-3bif (E-3b1-M35), which
moved to South Africa only 2000 Kya. For a long time they were all the men there were, and they certainly got far enough north to leave Africa, presumably across the Bab al Mandeb.
https://www.pnas.org/content/105/31/10693
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https://www.familytreedna.com/groups/bydna/about/background
'Haplogroup B is an ancient Y chromosome clade that is almost entirely restricted to Africa. It is the second oldest clade after A, and it is spread very thinly throughout the continent. Today, the highest frequencies of B are found among small hunter-gather populations, and very rarely among populations of African descent outside of Africa. Clues about their ancient origins are also suggested by the fact that some members of clades A and B possess click languages, which some anthropologists argue is a remnant of the oldest form of spoken language, belonging, perhaps, to all of our ancestors before their migration out of Africa."
https://en.wikipedia.org/wiki/Haplogroup_B-M60
Haplogroup B (
B-M60) is a
human Y-chromosome DNA haplogroup common to paternal lineages in
Africa. It is a primary branch of the
haplogroup BT.
B-M60 is common in parts of Africa, especially the tropical forests of West-Central Africa. It was the ancestral haplogroup of not only modern
Pygmies like the
Baka and
Mbuti, but also
Hadzabe from Tanzania, who often have been considered, in large part because of some typological features of their language, to be a remnant of
Khoisan people in East Africa.
B-M112[edit]
Haplogroup B-M112 (M112, M192, 50f2(P)) has been found mainly among
pygmy populations in Central Africa,
Juu (Northern Khoisan) populations in Southern Africa, and the
Hadzabe in East Africa. It also has been found occasionally in samples of groups who neighbor the aforementioned populations.
Specifically, haplogroup B2b has been observed in 67% (12/18) of a sample of Baka from Central African Republic,
[2] 52% (12/23) or 51% (29/57) of a sample of Hadzabe from
Tanzania,
[3][4] 48% (15/31) of a sample of Biaka from Central African Republic,
[2] 43% (20/47) of a sample of
Mbuti from the
Democratic Republic of the Congo,
[2] 31% (9/29) of a sample of Tsumkwe San from
Namibia,
[2] 28% (11/39) of a sample of the
Northern Khoisan-speaking Ju|’hoansi and Sekele peoples,
[3][7] 25% (6/24) of a sample of
Burunge from Tanzania,
[4] 14% (13/94) of a sample of
Tutsi from
Rwanda,
[9] 13% (9/68) of a sample of
Sandawe from Tanzania,
[4] 9% (3/32) of a sample of !Kung/Sekele from Namibia,
[2] 5% (1/20) of a sample of
Turu from Tanzania,
[4] 5% (2/43) of a sample of
Wairak from Tanzania,
[9]3% (1/29) of a sample of Zulu from
South Africa,
[2] 3% (1/33) of a sample of Bakola from southern Cameroon,
[2] 3% (1/35) of a sample of
Datog from Tanzania,
[4] 3% (1/35) of a sample of
Malagasy,
[12] 1.4% (1/69) of a sample of
**** from Rwanda,
[9] 1.4% (1/72) of a sample from Qatar,
[15] and 1.3% (2/157) of a sample from Saudi Arabia.
[16]
and what part of east africa did they originate prior to their arrival to somalia?
