אֵ֖לֶּה שְׁמ֣וֹת בְּנֵֽי־עֵשָׂ֑ו אֱלִיפַ֗ז בֶּן־עָדָה֙ אֵ֣שֶׁת עֵשָׂ֔ו רְעוּאֵ֕ל בֶּן־בָּשְׂמַ֖ת אֵ֥שֶׁת עֵשָֽׂו׃
דאָס זײַנען די נעמען פֿון עֵשָׂוס זין: אֶליפַז דער זון פֿון עֵשָׂוס װײַב עָדָהן, רְעואֵל דער זון פֿון עֵשָׂוס װײַב בשׂמַתן.
Radak
אלה שמות, first the Torah lists the names of his sons, followed by the names of his grandsons. No grandchildren of Oholvamah are mentioned. This need not mean that she did not have grandchildren, but, since the Torah was concerned with listing the Alufim, men of positions of authority, it is likely that none of Oholivamah’s grandchildren rose to such positions whereas her sons did.