The solemn mourning for Jacob gave a name to the place; Abel — mizraim — The mourning of the Egyptians: which served for a testimony against the next generation of the Egyptians, who oppressed the posterity of this Jacob, to whom their ancestors shewed such respect.
Related Commentaries of Genesis 50:11
Genesis 50:11
11 And when the inhabitants of the land, the Canaanites, saw the mourning in the floor of Atad, they said, This is a grievous mourning to the Egyptians: wherefore the name of it was called Abelmizraim,b which is beyond Jordan.