And Bethuel became the father of Rebekah. Milcah bore these eight sons to Abraham’s brother Nahor.
This is recorded here, 1. To show that though Abraham saw his own family highly dignified with peculiar privileges, admitted into covenant, and blessed with the entail of the promise, yet he did not look with contempt and disdain upon his relations, but was glad to hear of the increase and prosperity of their families. 2.
Commenting on Genesis 22:20-24
And his concubine, whose name was Reumah,.... Not an harlot, but a secondary wife, who was under the proper and lawful wife, and a sort of a head servant in the family, and chiefly kept for the procreation of children; which was not thought either unlawful or dishonourable in those times such as was Hagar in Abraham's family: she bare also Tebah, and Gaham, and...
Bethuel begat Rebekah - Who afterward became the wife of Isaac.