The Berbers are related to the Sa'ami.
O and A blood types are distributed in about equal amounts across Europe. There is a higher % of O type blood concentrated in Wales though.
O and A are, yes, but Rh negative blood isn't.
Rh negative blood is essentially non-existent outside of Europe, a little slice of North Africa, a slice of Israel, and parts of the New World.
Within Europe, it's highest concentration is in the Basque country, with Ireland a close second and Wales and Brittany behind them. Interestingly, there is NOT much of a concentration in the intermediate lands, nor in surrounding Spain, France, Italy, Germany or further East. Not much in England or Scotland, but a lot in Ireland and Wales. (Essentially, this tells us that the trait arrived by boat, and gives a strong boost to the ancient Irish "Milesian" legend, which said that the Irish actually sailed from what is now Spain in a fleet commanded by a leader named Miletus. If that sailing were from the Basque country, it follows a straight line across the Bay of Biscay to Brittany, Wales and Ireland, bypassing everything else.
But then you've got that outcropping of negative blood among a certain Berber tribe in the Atlas Mountains (only), and it's practical non-existence elsewhere. Amongst the Jews is easier to fathom, given their pelerinations and intermarriage over the centuries. Still, it's a RECESSIVE trait, which gives pause.
Anyway, it's a queer thing.