וַיֹּ֣אמֶר לָהֶ֔ם הַיְדַעְתֶּ֖ם אֶת־לָבָ֣ן בֶּן־נָח֑וֹר וַיֹּאמְר֖וּ יָדָֽעְנוּ׃
He said to them, “Do you know Laban the son of Nahor?” And they said, “Yes, we do.”
Genesis 29:5 (The Contemporary Torah, JPS 2006)
The careful reader will note that Laban is not the son of Nahor, but the son of Bethuel.
At this time, Bethuel is believed to be dead.
The rabbis maintain that Bethuel was wicked and an outcast. What we may have here is the act of blotting out his name by his people.