The Messiah Of Elelohe-Israel
Shortly after the LORD (see the Fact Finder question below to understand who "the LORD God" was and is) renamed Jacob as "Israel" (see The Origin Of 'Israel'), Jacob arrived in Samaria where he purchased a field and dug a well i.e. "Jacob's well was there." Nearby, Jacob built an altar to the LORD, calling it "Elelohe-Israel," meaning The Almighty is the God of Israel - a personal statement of faith and obedience, considering that the LORD had just given the name "Israel" to Jacob. Israel didn't yet exist in a national (there was no nation called Israel) or family (Jacob's children, from whom the Israelites began, were still then just that, children) way.
"33:18 And Jacob came to Shalem, a city of Shechem, which is in the land of Canaan, when he came from Padanaram; and pitched his tent before the city. 33:19 And he bought a parcel of a field, where he had spread his tent, at the hand of the children of Hamor, Shechem's father, for an hundred pieces of money. 33:20 And he erected there an altar, and called it Elelohe-Israel." (Genesis 33:18-20 KJV)
"4:5 Then cometh he to a city of Samaria, which is called Sychar, near to the parcel of ground that Jacob gave to his son Joseph. 4:6 Now Jacob's well was there. Jesus therefore, being wearied with his journey, sat thus on the well: and it was about the sixth hour [i.e. about noon; see Hours Of The Day]" (John 4:5-6 KJV)
"Jacob's well was there"
Jesus of Nazareth is the Messiah of all people, of all nations. That lesson was made evident in His words to a non-Israelite "Samaritan" woman (see The Samaritans Of Israel). True "Israel" are those who recognize and obey the LORD.
"4:7 There cometh a woman of Samaria to draw water: Jesus saith unto her, Give me to drink. 4:8 For his disciples were gone away unto the city to buy meat.