There are two types of skulls mentioned long and broad skulls. The broad skulls may be the Neanderthal type. The Neanderthal type may be the gene from red hair.
Research leader Dr. Rosalind Harding said: “It is certainly possible that red hair comes from the Neanderthals.” The Neanderthals are generally thought to have been a less intelligent species than modern man, Homo sapiens. They were taller and stockier, but with shorter limbs, bigger faces and noses, receding chins and low foreheads. ”
A DNA study has concluded that some Neanderthals also had red hair, although the mutation responsible for this differs from that which causes red hair in modern humans. wiki
Most humans carry some Neanderthal Genes, that is most non-Africans do. These broad skull people are associated with Neanderthals, with redheads of a different line, and possibly a portion are descended from Cain.
The term to describe the broad skull and large brow is brachycephalic.
The long skulls were connected to the egyptian pharoahs line.
~Chris L Lesley