Read Genesis 26:33 Using Other Translations
And he called it Shebah: therefore the name of the city is Beersheba unto this day.
He called it Shibah; therefore the name of the city is Beersheba to this day.
So Isaac named the well Shibah (which means “oath”). And to this day the town that grew up there is called Beersheba (which means “well of the oath”).