Isaak is the personal name used for the man identified as Abraham’s son, Jacob’s father, and an heir of promise.

The term consistently identifies the same named person: Abraham fathers him, he fathers Jacob, and he is named in statements about promise, blessing, faith, and the God of Abraham, Isaac, and Jacob.

1. Personal name in ancestral and promise contexts · dominant

   The forms identify the named individual within family and ancestral statements: in Matthew 1:2 the APB renders Abraham begetting Isaac and Isaac begetting Jacob, while Luke 3:34 places him between Jacob and Abraham. The same name occurs in promise and faith statements, including Abraham offering him in Hebrews 11:17 and Isaac invoking blessings on Jacob and Esau in Hebrews 11:20.

   Matthew 1:2Luke 3:34Acts 7:8Hebrews 11:17Hebrews 11:20Romans 9:7

In the Anselm Project Bible: Across the supplied verses, the APB consistently presents the name as “Isaac,” in genealogical statements, ancestral formulas, and accounts involving promise, offering, and blessing. These renderings confirm the verse-level identification rather than establish finer distinctions.