i
Jacob is named Jacob, Yaakov, because he is born clutching the heel, eikev, of Esau, his older twin brother.
He will live a life following on the heels of his brother. (Or consider the Hebrew, la'akov: to follow).
Jacob is given the family blessing, not because it is meant for him—it is meant for Esau; but because he tricks his father into giving him Esau's blessing.
ii
Then a nameless angel wounds Jacob in the thigh, and calls Jacob Israel.
Now, there is no one for Jacob—Israel—to follow after (the angel is nameless). And with the wound, the symbol of the leg (the source of following) is taken from Jacob.
*
Jacob was one who chased after his brother's life.
Becoming Israel, Jacob is called to have his own, separate life.
To be Israel is to have a life apart.
***
Based partially on comments of Rabbi Matthew Stein and my wife, Kathi.
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