Note on Abram and His Father

Genesis 12:4b - "and Abram was seventy and five years old when he departed out of Haran."

Abram left his father after his father Terah's death (Acts 7:4), so Abram could not have been Terah's firstborn: do math from Genesis 11:26, 11:32.  Terah begat his firstborn at age 70, and begat Abram around age 130.

VM