Why does the torah need to tell us the name of hadar?s wife?
Ba?al ha?Turim: Because she was the daughter of the communal leaders and it was through her that he became king.
Why is the daughter of Matred referred to as "Bas Mei Zahav"?
Rashi: Because her father was so wealthy that gold meant nothing to him (it flowed like water).
Targum Onkelos: He was a refiner of gold (melting it like water).
Targum Yonasan: He worked in trapping animals, 1 from which he became exceedingly rich. From the proceeds, he purchased a lot of property, and became very vain, and went around boasting 'What is silver, what is gold!'
Moshav Zekenim: It teaches that all 2 of them were Mamzerim. How can Meheitve'el have two fathers? We must say that one was her father, and he fathered her through someone else's wife 3 (and people mistakenly attributed the daughter to her mother's husband).
See also Na'ar Yonasan.
How do we learn that all were Mamzerim? Perhaps only she was! (PF)?
Oznayim la'Torah: We find that Eisav 'broke the fence that the nations built' after the Flood, not to indulge in adultery and in incest. Already in his teens, he had relations with a betrothed girl, and throughout his life he took women from their husbands. In fact, that is why he declined to be circumcised - since Milah is a fence against Zenus, which went against his core desires.
Why is the death of the last king, Hadar, not recorded?
Peninim mi'Shulchan ha'Gra, Malbim (to Divrei ha'Yamim I 1:43): Because he lived in the days of Moshe and had not yet died when the Torah was written. 1
It is however, recorded in Divrei ha'Yamim (I 1:47, albeit by the name 'Hadad'), because the author of Divrei ha'Yamim was Ezra, by whose time he had already died.
