The Scofield Bible Commentary, by Cyrus Ingerson Scofield, , at sacred-texts.com
Not all at once does "Jacob" cease to dominate the walk of "Israel." Compare (Gen 35:1-10) where the walk becomes according to the new name.
Called "Sychem," (Act 7:16).
That is, God, the God of Israel. Jacob's act of faith, appropriating his new name, but also claiming Elohim in this new sense as the God through whom alone he could walk according to his new name. See (Gen 14:18-23).
See note 2 of (See Scofield) - (Gen 14:18) for a similar appropriation by Abraham.