Matthew Poole and continuators on Genesis 11:26

26. And Terah lived seventy years, and begat Abram, Nahor, and Haran.

(i. e.) Began to beget, as Gen. 5. 32,

Who is first named in order of Dignity, for which cause Shem is put before Ham and Iapheth, and Moses before Aaron, not in order of time, which seems to be this, Haran probably was the eldest, because Nahor married his Daughters; Nahor the second; and Abram certainly was the youngest, because Terah, Abrams Father lived two hundred and five years, ver. 32. and Abram after his Fathers Death, Acts 7. 4. went out of Haran, when he was seventy five years old, Gen. 12. 4, 5. therefore he was not begotten in Terahs seventieth year, when Terah began to beget his Sons, as here is said, but in his one hundred and thirtieth year, and so there remains seventy five years precisely to Abrams departure. And Sarai, Harans Daughter was but ten years younger than Abram, Gen. 17. 17. and therefore Haran was Abrams Elder Brother.

Marginal references: Josh. 24. 2. 1 Chro. 1. 26.