Who was Israel's father?

Answer 1

The man named Israel was identical with Jacob, to whom God gave the additional name of Israel (Genesis ch.35). His father was Isaac (Genesis ch.25).

Isaac (Yitzhak) was a son of Abraham (Genesis ch.21); and God said that His covenant with Abraham would continue with Isaac (Genesis 17:18-19). Isaac had facial features that were identical to Abraham (Rashi commentary, Genesis 25:19).

God tested Abraham by asking him to offer Isaac as an offering (see Genesis ch.22); and this readiness for self-sacrifice bestowed a special holiness upon Isaac (Talmud, Yevamot 64).
Isaac married Rebecca (Genesis ch.24), his second cousin. Rebecca gave birth to two sons, Esau and Jacob (Genesis ch.25).

God spoke to Isaac, confirming His covenant with him (Genesis ch.26).
Despite harassment from the Philistines, Isaac enjoyed great success (ibid.). He reopened all the wells which his father had dug and the Philistines had stopped up (ibid.). The king of the Philistines, unable to ignore Isaac's phenomenal success, petitioned him to make a mutual treaty of non-aggression (ibid.).

In his advanced years, Isaac sought to bless his elder son Esau (Genesis ch.27). Rebecca took pains to thwart this and to ensure that Jacob would receive the blessing, since she had learned through prophecy (Genesis 25:23) that Jacob would be more favored by God. (See: Isaac's blessing)

Later it became apparent that Isaac admitted to Rebecca's having done the right thing, since he blessed Jacob again (Genesis 28:1-4) even after he found out what had happened (see Genesis 27:6-16).

Isaac sent Jacob to the ancestral family seat in Mesopotamia to choose a wife (Genesis ch.28). Though Jacob didn't return for over twenty years (Genesis 31:38), God granted Isaac extra years, so that he lived on for two decades after Jacob's return.
Isaac was buried next to his father Abraham, in Hebron (Genesis 49:31).

Jacob, son of Isaac, was the last of the Patriarchs (Talmud, Berakhot 16b). He spent a lot of time in the tents (Genesis 25:27) studying his ancestors' teachings (Rashi commentary, ibid.); and eventually, like Abraham and Isaac before him, attained prophecy, in which God confirmed His covenant and promised His protection (Genesis 28:10-15).

When the opportunity presented itself, Jacob asked his elder twin brother Esau to sell him his birthright (Genesis 25:29:34), since he sensed that Esau wasn't pious enough to fully deserve it. Thus began the fulfillment of the prophecy which Rebecca had heard, that Jacob would become the dominant of her two sons (Genesis 25:22-23).

Jacob's life was replete with tribulations (Rashi commentary, Genesis 43:14). He managed to come out ahead despite the wiles of the deceitful Laban (Genesis 29:25 and 31:41) and the danger presented by the angry Esau (Genesis 27:41 and 32:12).

There were painful events with his daughter Dinah (Genesis 34:1-7) and with his being separated for two decades from his beloved son, Joseph (Genesis ch.37); and his wife Rachel died at a young age in childbirth (Genesis 35:16-19).

These troubles were a portent for the tribulations of the Jews in their times of exile. But Jacob received God's affirmation of His covenant and blessing (Genesis 28:13-14; 35:9-12; 46:2-4), signifying that the exile would eventually end. God gave Jacob the honor-title of Israel, indicating his eventual ascendancy (Genesis ch.35).