'Grandmother' in the Bible

The sons of Naphtali: Jahziel, Guni, Jezer, and Shallum, the sons of Bilhah.

But Jehoshabeath, the king’s daughter, took Joash the [infant] son of Ahaziah and stole him away from among the king’s sons who were being put to death, and she placed him and his nurse in the bedroom. So Jehoshabeath, the daughter of King Jehoram [of Judah] and wife of Jehoiada the priest, hid Joash from [his grandmother] Athaliah so that she did not murder him (for Jehoshabeath was the sister of Ahaziah).

I remember your sincere and unqualified faith [the surrendering of your entire self to God in Christ with confident trust in His power, wisdom and goodness, a faith] which first lived in [the heart of] your grandmother Lois and your mother Eunice, and I am confident that it is in you as well.