Now these are the generations of Terah: Terah begat {1} Abram, Nahor, and Haran; and Haran begat Lot.

(1) He makes mention first of Abram, not because he was the first born, but for the history which properly belongs to him. Also Abram at the confusion of tongues was 43 years old, for in the destruction of Sodom he was 99 and it was destroyed 52 years after the confusion of tongues.

Wesley's Notes

11:27 Here begins the story of Abram. We have here, His country: Ur of the Chaldee's - An idolatrous country, where even the children of Eber themselves degenerated. His relations, mentioned for his sake, and because of their interest in he following story. His father was Terah, of whom it is said, Jos 24:2, that he served other gods on the other side the flood; so early did idolatry gain footing in the world. Enough it is said, Ge 11:26, that when Terah was seventy years old he begat Abram, Nabor and Haran, which seems to tell us that Abram was the eldest son of Terah, and born in the 70th year; yet by comparing Ge 11:32, which makes Terah to die in his 205th year, with Acts 7:4, where it is said that Abram removed from Haran when his father was dead, and Ge 12:4, where it is said that he was but 75 years old when he removed from Haran, it appears that he was born in the 130th year of Terah, and probably was his youngest son. We have, Some account of his brethren Nahor, out of whole family both Isaac and Jacob had their wives. Haran, the father of Lot, of whom it is here said, Ge 11:28, that he died before his father Terah. 'Tis likewise said that he died in Ur of the Chaldees, before that happy remove of the family out of that idolatrous country. His wife was Sarai, who, tho' some think was the same with Iscah the daughter of Haran. Abram himself saith, she was the daughter of his father, but not the daughter of his mother, Ge 20:12. She was ten years younger than Abram. His departure out of Ur of the Chaldees, with his father Terah, and his nephew Lot, and the rest of his family, in obedience to the call of God. This chapter leaves them in Haran or Charran, a place about the mid - way between Ur and Canaan, where they dwelt 'till Terah's head was laid; probably because the old man was unable, through the infirmities of age, to proceed in his journey.

Matthew Henry's Concise Commentary

11:27-32 Here begins the story of Abram, whose name is famous in both Testaments. Even the children of Eber had become worshippers of false gods. Those who are through grace, heirs of the land of promise, ought to remember what was the land of their birth; what was their corrupt and sinful state by nature. Abram's brethren were, Nahor, out of whose family both Isaac and Jacob had their wives; and Haran, the father of Lot, who died before his father. Children cannot be sure that they shall outlive their parents. Haran died in Ur, before the happy removal of the family out of that idolatrous country. It concerns us to hasten out of our natural state, lest death surprise us in it. We here read of Abram's departure out of Ur of the Chaldees, with his father Terah, his nephew Lot, and the rest of his family, in obedience to the call of God. This chapter leaves them about mid-way between Ur and Canaan, where they dwelt till Terah's death. Many reach to Charran, and yet fall short of Canaan; they are not far from the kingdom of God, and yet never come thither.