Jecoliah (יְכָלְיָה) means "YHWH is able" or "YHWH has prevailed" in Hebrew. In 2 Kings 15:2, Jecoliah was the mother of King Uzziah (Azariah) of Judah — one of Judah's most prosperous rulers, whose 52-year reign coincided with the prophet Isaiah's early years.
Rare but iconic in biblical scholarship.
Jecoliah reduces to six — the number of Judahite queen-mother.