Analysis of information sources in references of the Wikipedia article "قطورہ" in Urdu language version.
Keturah. The most ignored significant person in the Torah. Rashi follows an old rabbinic idea that she is Hagar. But there is no basis for this in the text, and other traditional commentators reject it (Ibn Ezra, Ramban, Rashbam).
Rashi supposes that Keturah was one and the same with Hagar—so the Midrash, the Targum Yerushalmi, and that of Jonathan.... but Aben Ezra and most of the commentators contend that Keturah and Hagar are two distinct persons....