https://en.wikipedia.org/wiki/Haplogroup_E-V32
In human genetics, E-V32, also known as E1b1b1a1a1b[1] (Formerly E3b1a1a), is a Y DNA Chromosome haplogroup found primarily in the Horn of Africa, a descendant of the larger E-V68 branch of the macrohaplogroup E.
Haplogroup E-V32
Origins
"Cruciani et al. (2007) suggest that this sub-clade of E-V12 originated in
North Africa, and then subsequently expanded further south into the
Horn of Africa, where it is now prevalent.
[Note 3] Before the discovery of V32,
Cruciani et al. (2004)referred to the same lineages as the "gamma cluster", which was estimated to have arisen about 8,500 years ago. They stated that "the highest frequencies in the three
Cushitic-speaking groups: the
Borana from
Kenya (71.4%), the
Oromo from
Ethiopia (32.0%), and the
Somali (52.2%). Outside of eastern Africa, it was found in two subjects from Egypt (3.6%) and in one Arab from Morocco".
This is the group that migrated up the Nile to the Lake Turkana area and entered Somalia from the south..
T and J probably precede this group in Somalia by at least a thousand years and almost certainly entered from the north. There is a debate over whether T was in Somalia at 6-8 kya, or in the Red Sea hills then and moved south at 3kya.
My best guess: the Southern Cushites moved south also from this Lake Turkana area. V-32 only began moving north about the beginning of the Common Era. In Somalia, E-V-32 went north and then east and then south. The Hawiyya follow the Shabelli out of the Ogaden, arriving at Merka by about 1100 AD. The northern clans form in the 12th-13th centuries and begin to expand into the camel lands of the south, giving the illusion of a generally southern movement. Think about it: Except for pockets of Dir fleeing the Adal wars, those moving south were all Darood. T has been stable, right where they are today, for millenia. J also has an ancient history with the Warsangali, who have also not moved much.
Looks like E-V-32 were (are) major wanderers.