Like its closest relatives within the larger E-M215 haplogroup, E-M123 is found in Asia, Europe and Africa.
In fact E-M34 seems to be restricted to Semitic speakers in Ethiopia, as it has not been detected in other populations in the region such as Somalia, Kenya (Cruciani et al. 2004).
Looking beyond its geographical patterns, E-M123 is also quite common in many Semitic language communities, including among Ashkenazi, Ethiopian, and Sephardic Jews, accounting for over 10% of all male lines (Semino et al. 2004).
The table below brings together all of these works at the point of the landmark 2002 YCC Tree.
This allows a researcher reviewing older published literature to quickly move between nomenclatures.