Just wanted to drop this in here.
I actually agree on Semitic languages being in the Horn for longer than the usually expected 3000-2800 years but for very different reasons than you.
E-V12 is most definetly a Nile valley lineage, connected to Southern Egypt (Ancient Egyptians); Northern Sudan (Ancient Kush kingdom); and the spread of Cushitic languages into the Horn of Africa. If it was indeed connected to the Semitic formation, we’d see some minor % across ALL Semitic speakers outside of Africa as well (which we don’t with a few minor exceptions due to historical movements in antiquity).
Undifferentiated E-V12* lineages (not E-V32 or E-M224, so therefore named "E-V12*") peak in frequency among Southern Egyptians (up to 74.5%). Which further illustrates that this border region (Southern Egypt/Nortern Sudan) believed to be the paternal origin of the Cushitic peoples, actually is the origin region.
Look up this study on E-V12:
https://pmc.ncbi.nlm.nih.gov/articles/PMC4524485/
Actually we see E-V12, and it’s subclade E-V32 predominately amongst Cushitic speakers and to a lesser degree in Southern Egypt and North and East Sudan. So exactly where we‘d expect E-V12 to be if it was a founding lineage of Cushitic speakers. Further studies on E-V12’s and E-V32’s position:
https://wayback.archive-it.org/all/...Tracing-Past-Human-Male-Movements-in-Northern
https://www.nature.com/articles/5201390
https://pmc.ncbi.nlm.nih.gov/articles/PMC1181964/
Your theory on E-V12 makes little to no sense.
Natufians (the ancestors of Semitic speakers) were mostly E-Z830 carriers; it‘s oldest appearance is in the Levant and over 12,000 years old. Generally E-Z830 is regarded as Levantine (other than E-M78 which is North African in origin).
Hence lineages like E-M123 are directly related to the spread of Semitic. Guess what - most Semitic speakers that carry E-M215 (E1b1b) carry a E-Z830 lineage, and mostly E-M123.
Here’s an scientific article on Natufians and their genetic composition, mentioning E-Z830:
https://figshare.com/articles/prese...an_genetic_Connections/28924583?file=54155954
Now we come to the most understudied E-Z830 lineage; E-V1515.
Some 1.5-2.5% across the Arabian & Levantine world, also carry E-V1515 (which is a E-Z830 descendant).
Its an earlier subclade of the Natufian E-Z830 lineage, and guess where it’s most common?
- Amongst Ethio-Semitic speakers and neighbouring ethnic groups in Eritrea & Northern Ethiopia.
Look up E-V1515 on Y-Tree:
https://www.yfull.com/arch-4.03/tree/E-V1515/
Some E-V1515 subclades (like E-V42) are not even present in Africa, and (as of right now) only detected in Arabian countries:
https://www.yfull.com/tree/E-V42/
E-V1515 only has one subclade (E-M293) outside of Semitic speaking regions. It formed in Southern Ethiopia around 4000 years ago and then migrated to Kenya, Burundi and Rwanda.
This is also mentioned in the study linked down here:
https://www.researchgate.net/figure...and-its-major-subhaplogroups-A_fig3_280314229
Ironically the East African Pastoralists were all under E-M293, so this lineage most likely assimilated into South Cushitic groups around ~ 4000 years ago. Therefore Semitic migrations in Eritrea & Northern Ethiopia might have appeared over 4000 years ago.
The E-M293 mutation It is still present in Nilo-Saharan groups like the Daatoga and Maasai.
The only thing I disagree with in the study is that the E-V1515 lineage entered Africa 12kya - which I highly doubt. Their conclusion is based upon the spread of E-V1515 in the modern age, however it should have been important to deduct genetic analysis across the Arabian peninsular to understand the migration pattern from E-Z830 in the Levant to E-V1515 in Northeastafrica (Eritrea & Northern Ethiopia).
If you see where it’s spread outside of Africa and adding that information to the origin of E-Z830 in the Levant, it becomes clear that it migrated trough Arabia into Abyssinia. The migration map by HRAS assumes the same.
Look up the migration map on HRAS:
https://hras.yseq.net/?dna_type=y&map_type=classic
Also J1 is often associated with Semitic migrations, however J1 was not important to the formation of Semitic peoples; and rather assimilated to already existing Semitic groups. It’s earliest appearance in the Levant is roughly 5700 years ago, so right after Proto-Semitic evolved.
This gives some place for the first South Semites (E-V1515 carriers) entering Eritrea/Northern Ethiopia while J1 simultaneously entered the Levant & Arabia (and later on North Africa & East Africa). This is why the Sabean migrations (J1 and E-M84 carriers) came in later than the first Semites.
Here’s a study on J1 mentioning it’s appearance in the Levant & Arabia ~5700 years:
https://www.nature.com/articles/s41598-021-85883-2
Lastly there’s the linguistic argument, a 2012 study focused on positioning Tigre in the broader Ethio-Semitic language branch; also came to the conclusion of all Ethio-Semitic languages only sharing a South Semitic branch origin, and not necessarily a common „Proto - Ethio-Semitic language“. This would even more underline that there were separate migrations.
Here’s the study:
„M. Bulakh, L. Kogan. “The Genealogical Position of Tigre and the Problem of North Ethio-Semitic Unity“ // ZDMG 160 (Heft 2), 2010, 273-302"
So my theory is, that there were multiple migrations from South Arabia into the Horn being genetically and linguistically impactful with the last major migration (Sabeans) being more culturally impactful (adaption of Sabean agriculture, architecture, statehood and writing system).
Those who settled in the Highlands during the D‘mt/Sabean period were carrying J1 and E-M34>E-M84; however the first Semitic migrations into the Highlands were under E-V1515 and predate the Sabean migrants the by (x) amount of years.
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