Milcah (מִלְכָּה) is the Hebrew word for "queen" — from melech (king). Multiple women in the Hebrew Bible bear this name: Lot's daughter, Nahor's wife, and one of the five daughters of Zelophehad who successfully argued for women's inheritance rights (Numbers 27).
Milcah is widely used in religious Jewish and Christian families.
Milcah reduces to two — the number of biblical queen.