Chaldean from Ur in modern day Iraq is I think widely accepted as Abrahams origin
But I’ll let folks for whom this bloodline is coveted argue over it
I’m Celto Saxon.....way different tribes....the blood matters none to me for its exclusivity
What does matter to me is the lesson and prophecy Abraham and Moses illuminated for posterity and the providential role both played in ultimately bringing about the birth of the son of God
But trust me
On this forum it gets contentious real quick who makes best claim to the history and the DNA
You DO NOT have to be of the blood to receive the fruits
The ‘blessings’ follow the ‘bloodline’... Look what happened to Esau... he sold his birthright and God took his blessing... God had it written two times Jacob I love Esau I hated.