https://g.co/kgs/3DRgqQ It says:
Children- Abraham,Haman So is he a brother to Abraham and the son to Amathlaah
The Bible does not say who Abraham’s mother was. It only says that Abraham’s father was Terah:
After Terah had lived 70 years, he became the father of Abram, Nahor and Haran (Genesis 11:26).
Abraham’s wife, Sarai, was the daughter of Abraham’s father, but not the daughter of Abraham’s mother (Genesis 20:12). However, there is no mention of any Haman.
One Jewish source from the Talmud suggests that Abraham’s mother was Amathlai, the daughter of Karnebo. As for the genealogy of Abraham, this Wikipedia article gives details on Abraham’s Family Tree: https://en.wikipedia.org/wiki/Abraham%27s_family_tree
Haman the Agagite is introduced in Esther 3:5–6 as an enemy of Mordecai and the Jewish people. He is possibly a descendent of Agag, king of the Amalekites, long-time enemies of the Jewish people. The Amalekites are not listed in the table of nations in Genesis 10, as they did not originate until after Esau’s time. You may find these articles helpful:
Haman was not related to Abraham.